Discover the best geothermal areas in Iceland with this complete regional guide. From steaming Mars-like landscapes near the airport to bubbling mud pools, erupting geysers, and remote Highland hot springs. Find out where to go, what to see, and how to visit safely.
Iceland sits on top of the Mid-Atlantic Ridge and the Icelandic Hotspot, which is why steam rises from the ground in nearly every region. Geothermal areas are some of the most unforgettable stops on a Golden Circle day trip or a longer self-drive tour around Iceland.
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This guide covers the country's most accessible and rewarding geothermal sites, organized by region so you can fit them into your itinerary without backtracking. You'll find world-famous spots like Geysir and Strokkur, hidden Highland fields, and a few places where you can safely take a dip.
The easiest way to see geothermal areas is to book a guided tour that handles transport and timing for you. If you'd rather drive yourself, renting a car in Iceland gives you full flexibility, especially for the Reykjanes Peninsula and Ring Road sites. Highland sites require a 4x4 vehicle in summer.
Keep reading to learn everything you need to know about Iceland's geothermal areas. You'll find the best sites by region, essential safety tips, how Iceland uses this energy, and how to plan your visit.
Key Takeaways
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Iceland sits on the Mid-Atlantic Ridge and a volcanic hotspot, which is why geothermal areas are spread across every region of the country.
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The most accessible geothermal sites are on the Reykjanes Peninsula near Keflavik Airport, including Gunnuhver and Seltun, both within a 30 to 40-minute drive of Reykjavik.
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Haukadalur Valley on the Golden Circle is the most famous geothermal area in Iceland, home to the geyser Strokkur, which erupts every 5 to 10 minutes.
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Deildartunguhver in West Iceland is the most powerful hot spring in Europe and pairs naturally with the Krauma Baths and nearby waterfalls.
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North Iceland's Hverir at Namaskard Pass offers the country's most Mars-like geothermal landscape, while neighboring Leirhnjukur features lava flows from the 1980s.
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Highland sites like Hveravellir and Kerlingarfjoll are only accessible in summer and require a 4x4 vehicle.
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Bathing is only safe at designated spots, including Reykjadalur, Hveravellir, the Blue Lagoon, and Krauma. All other natural pools are scalding hot.
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Stick to marked paths and boardwalks at all geothermal sites, since surface temperatures often exceed 212 F (100 C).
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Around 85% of Icelandic homes are heated using geothermal energy, and 30% of the country's electricity also comes from geothermal sources.
Why Iceland Has So Many Geothermal Areas?
Iceland sits on top of the Mid-Atlantic Ridge and a volcanic hotspot, a rare combination that heats the ground beneath your feet across the entire country. For travelers, this means you're never far from a hot spring, steaming vent, or geothermal spa, no matter where your itinerary in Iceland takes you.
Close to Reykjavik, you can soak at the Blue Lagoon or explore the steaming Gunnuhver Geothermal Area on the Reykjanes Peninsula. Both are easy stops before or after your flight and work well for short layovers or the first day of your trip.
Along the Ring Road, you'll find iconic spots like the Geysir Geothermal Area on the Golden Circle. Here, Strokkur erupts every few minutes, and the bubbling mud pots of Hverir in North Iceland. Both are easily reached by rental car or on guided day tours.
For a more remote experience, head into the Highlands to Landmannalaugar, where colorful rhyolite mountains surround a natural hot spring you can bathe in. Accessible only in summer by 4x4 or guided tour, it's one of Iceland's most rewarding geothermal adventures.
Safety Tips for Visiting Geothermal Areas in Iceland
Geothermal areas are some of the most rewarding places to visit in Iceland, and a little preparation makes them easy to enjoy safely. The ground can hide pockets of very hot water or mud, often well above 212 F (100 C). Well-marked paths and boardwalks make it simple to take everything in.
Here's what to keep in mind before you go:
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Stick to marked paths and boardwalks. They're laid out to give you the best views while keeping you clear of the hottest spots. Iceland's geothermal sites are well signposted, so following the route is easy.
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Expect a bit of a sulfur smell. Most geothermal areas give off hydrogen sulfide, which smells faintly like rotten eggs. It's harmless in the open air, and most visitors stop noticing it after a few minutes.
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Leave silver jewelry at your hotel. The sulfur can tarnish silver rings, necklaces, and earrings, so take them off before heading out.
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Dress for Icelandic weather. These sites are exposed and often breezy. Waterproof layers, sturdy shoes, and a warm hat will keep you comfortable year-round.
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Keep an eye on children and pets. With steaming vents and loose gravel around, keep little ones close and pets on a lead.
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Save your dip for designated pools. Some geothermal areas have wonderful bathing spots, which we'll point out as we go. Those are the ones to enjoy.
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Check before flying drones. A few sites restrict drones to protect wildlife and other visitors, so check the signage when you arrive.
Geothermal Areas in Iceland by Region
The sites below are grouped geographically so you can build them into a road trip or day tour without backtracking. Whether you're stopping over near the airport or circling the country on the Ring Road, there's a geothermal area within easy reach.
The Reykjanes Peninsula (Close to the Airport)
The Reykjanes Peninsula surrounds Keflavik International Airport and is the most accessible geothermal region in Iceland. Even with a few hours before a flight or after arrival, you can see world-class geothermal activity here without driving more than 30 minutes from the terminal.
A typical Reykjanes geothermal stop takes 30 to 60 minutes, and most sites are free with parking right at the entrance. Renting a car at Keflavik Airport makes it easy to combine two or three sites into a half-day loop before checking into your hotel.
Gunnuhver
Located near the Reykjanes Lighthouse, Gunnuhver features one of Iceland's largest mud pools and roaring columns of steam that you can see from far away. The site is named after a local legend: a troubled woman named Gunna, whose ghost was said to have been trapped in the spring by a priest.
A short boardwalk loops past the steaming vents and takes about 20 to 30 minutes to walk. The site is free, with a small parking lot right next to the boardwalk. The site is exposed to Atlantic winds, so a windproof jacket comes in handy even on sunny days.
Gunnuhver sits inside the Reykjanes UNESCO Global Geopark, so it pairs naturally with a visit to the Bridge Between the Continents and the Blue Lagoon. All three sit within a 20-minute drive of each other and Keflavik Airport.
Seltun (Krysuvik)
Seltun, also known as Krysuvikurhverir, is one of the most photogenic geothermal areas in Iceland. You'll walk along wooden boardwalks past two observation platforms, with bubbling mud pots, hissing fumaroles, and steaming solfataras on either side.
The orange, yellow, and red mineral deposits make it easy to come away with great photos, even on a phone. Plan around 30 to 45 minutes here. The site is free, with a paid parking lot at the entrance.
Seltun sits about a 40-minute drive from Reykjavik, so it's easy to combine with the Blue Lagoon or a longer Reykjanes loop. You can book your spa ticket in advance to skip the lines.
A short drive along Road 42 brings you to Fulipollur, a large black mud pool you can admire in a couple of minutes. Further on is the explosion crater Graenavatn, whose striking green waters come from high sulfur content.
The Golden Circle and the South
The Golden Circle is Iceland's most popular sightseeing route, and the south coast that extends beyond it offers some of the most active geothermal terrain in the country. Both can be done as day trips from Reykjavik.
Haukadalur Valley (Geysir and Strokkur)
Haukadalur Valley is the most famous geothermal area in Iceland and home to the hot springs Geysir and Strokkur. It's the middle stop on the Golden Circle route, between Thingvellir National Park and Gullfoss Waterfall.
Strokkur is the star of the show, erupting every five to ten minutes and sending boiling water 50 to 65 feet (15 to 20 meters) into the sky. Geysir, the original geyser that gave its name to every other geyser worldwide, is now mostly dormant.
Plan 45 minutes to an hour at the site. Entry is free, with parking and a Geysir Center across the road for restrooms, food, and souvenirs. It's about a 90-minute drive from Reykjavik. Position yourself downwind of Strokkur and stay behind the rope.
Hengill Geothermal Area and Reykjadalur
Photo by Regína Hrönn Ragnarsdóttir
Mount Hengill sits south of Thingvellir National Park and covers around 39 square miles (100 square kilometers) of steaming, hikeable terrain. It's home to the Hellisheidi power station, one of the world's largest geothermal plants, which supplies much of Reykjavik's heat and electricity.
The main draw is Reykjadalur, the "Steam Valley," reached by a 2-mile (3-kilometer) uphill hike from the village of Hveragerdi. At the top is a warm river where you can actually bathe, with temperatures shifting along its length so you can find a section that suits you.
Plan 3 to 4 hours for the round-trip hike, plus bathing time. Bring a swimsuit, towel, and sturdy shoes. The trailhead has free parking, and the village below has cafes and restrooms.
Another spot worth knowing is Olfusvatnslaugar, tucked away in remote terrain that's tricky to reach by road. It's a favorite landing site for helicopter tours, which fly from Reykjavik Domestic Airport and set down at some of Iceland's most active and inaccessible geothermal spots.
West Iceland
West Iceland is often overlooked by visitors rushing along the south coast, but it hides one of the country's most impressive geothermal sights.
Deildartunguhver
Deildartunguhver, in the Borgarfjordur region of West Iceland, is the most powerful hot spring in Europe. It pumps out around 48 gallons (180 liters) of boiling water per second at a temperature near 207 F (97 C), feeding a constant cloud of steam visible from the road.
A short, fenced path lets you stand remarkably close to the churning water, with safety barriers keeping you clear of the boiling flow. The hot water from here is piped directly to the towns of Borgarnes and Akranes through one of the world's longest hot-water pipelines.
A visit takes 20 to 30 minutes, with free entry and parking on site. Deildartunguhver is about a 90-minute drive from Reykjavik and pairs well with Hraunfossar and Barnafoss Waterfalls nearby. Stay for a soak at the Krauma Baths, built right beside the spring.
North Iceland
North Iceland is where geothermal landscapes feel most otherworldly, with two of the country's most photographed sites sitting just a few minutes apart.
Hverir at Namaskard Pass
Hverir (also called Hverarond) is the geothermal field at the base of Mount Namafjall, reached by crossing Namaskard Pass just east of Lake Myvatn. The landscape looks more like Mars than Earth, with red and ochre earth, towering steam vents, and ground so acidic that nothing grows.
A network of marked paths winds between bubbling mud pots, hissing fumaroles, and roped-off steam vents, with no boardwalks but clearly defined gravel trails. It's one of the most active surface geothermal sites in Iceland, and walking through the field feels genuinely otherworldly.
Hverir sits right on Route 1, making it one of the easiest stops on a Ring Road trip. Entry and parking are free, with no facilities on site. The sulfur smell is especially intense here, and a buff or scarf over your nose helps if you're sensitive.
Krafla, Leirhnjukur, and Viti Crater
A few minutes north of Namaskard lies the Krafla Volcanic System, home to one of Iceland's most dramatic geothermal walks: Leirhnjukur. The trail crosses fields of black lava that erupted as recently as the 1980s, with steam still rising through cracks and bubbling sulfur pools dotting the path.
Right next to the parking area is Viti Crater, a striking circular explosion crater filled with milky blue-green water, formed during the "Myvatn Fires" eruption of 1724. A short rim walk takes about 15 minutes and pairs naturally with Leirhnjukur.
The Leirhnjukur loop runs about 2 miles (3 kilometers) round-trip and takes 1.5 to 2 hours. Wear sturdy shoes, since the lava is sharp and uneven, and stay on marked paths around the geothermal vents and sulfur pools, as the ground can be unstable and dangerously hot beneath the surface.
The Icelandic Highlands (For the Adventurous)
The Icelandic Highlands are only accessible in summer, usually from late June to early September. Most routes require a 4x4 vehicle capable of crossing unbridged rivers, so check road conditions at road.is before setting out.
Hveravellir Nature Reserve
Hveravellir, whose name means "Hot Spring Fields," sits on the Kjolur route deep in the Highlands, between the glaciers Langjokull and Hofsjokull. After hours of grey Highland gravel, its steaming fields, color-coded hot springs, and silica deposits feel like an oasis.
A network of boardwalks loops past the blue Blahver, the green Graenihver, the red Raudihver, and the hissing Oskurholl mound. The headline experience is the small hand-built bathing pool, fed by the springs and usually sitting at a comfortable temperature year-round for a soak under the open sky.
Allow 2 to 3 hours to walk the boardwalks and bathe. The site has a small visitor center, basic accommodation, and a campsite, but no fuel. Bring a swimsuit, towel, food, and water. Reaching it requires a 4x4, or you can join a Highlands tour instead.
Kerlingarfjoll and Hveradalir Geothermal Field
The Kerlingarfjoll Mountain range is one of the most photographed landscapes in the Icelandic Highlands, with rhyolite hills glowing in shades of orange, pink, yellow, and green. Within it sits Hveradalir, the "Hot Spring Valleys," a geothermal field hissing with vents and bubbling pools.
The Hveradalir hike starts from the upper parking area and drops into a kaleidoscopic bowl of steaming ground, with a small warm stream where you can dip your feet at one designated spot. The full loop is about 2 to 4 miles (3 to 6 kilometers), depending on which route you take.
The hike takes 2 to 4 hours, depending on your pace and chosen route. The Highland center at the base offers accommodation, food, and showers, and the area is now a protected nature reserve. Reaching Kerlingarfjoll requires a 4x4 and crossing unbridged rivers.
How Does Iceland Harness Geothermal Energy?
Photo from Wikimedia, Creative Commons, by Gretar Ivarsson. No edits made.
Geothermal energy heats about 85% of Icelandic homes, with hot water piped straight from underground reservoirs into taps and radiators. Heating bills here are among Europe's lowest, and around 30% of the country's electricity also runs on geothermal power.
The same heat keeps city sidewalks clear in Reykjavik and Akureyri by running hot-water pipes beneath them in winter. It also powers greenhouses growing tomatoes, cucumbers, peppers, and even bananas year-round, just below the Arctic Circle.
The most visible example for travelers is the Blue Lagoon on the Reykjanes Peninsula. Its milky blue water is wastewater from the neighboring Svartsengi geothermal plant, cooled and rich in silica. Most of Iceland's public pools and spas are also heated geothermally.
Harnessing this energy isn't without controversy. Proposals for new plants and dams in the Icelandic Highlands have repeatedly met opposition from environmental groups worried about untouched wilderness being sacrificed, especially when cheap energy goes to industries like aluminum smelting.
Plan Your Geothermal Adventure in Iceland
Iceland's geothermal areas are some of the most extraordinary places on Earth, where you can stand within arm's reach of the forces actively shaping the planet. Whether you've got a few hours near Keflavik Airport, a Golden Circle day trip, or a full Ring Road itinerary, there's a site within easy reach.
These landscapes are also fragile. Stick to marked paths and respect the barriers, and you'll come away with memories no other destination can match. For more inspiration, check out our guides to hot springs in Iceland and the best things to do in Iceland.
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Did you enjoy our article, Geothermal Areas in Iceland? Which geothermal areas did you visit during your time in the country? Make sure to leave your thoughts and queries in the comments box below.
Michael Chapman is a British travel writer living in Reykjavík. A former scuba and lava cave guide, he draws on firsthand experience to write about Iceland’s nature and culture. He’s also the author of Hidden Iceland (2020).
