Lava Tunnel Caving & Silfra Snorkeling with Underwater Photos

Likely to sell out soon
Free cancellation
24/7 customer support
Best price guarantee



Tour starts
Reykjavík, Capital Region, Iceland
7 hours
May - Mar.
Minimum age
12 years old


Discover the incredible worlds hidden beneath Iceland’s landscapes and waterways with this snorkeling and caving combo adventure. Any seeking to pack their days with as many thrilling, unique activities as possible should not overlook this tour!

Your day begins when you are picked up from Reykjavik and driven to the nearby Blue Mountains. Before entering Leidarendi, your guide will provide you with a helmet and light and brief you on safety. You’ll then descend into one of the two entrances and begin to explore this subterranean world. Stalagmites, stalactites, and bizarre basalt formations decorate the halls and corridors, and throughout most of the year, you will also get to see beautiful crystal ice sculptures.

If your group is up to the task, you’ll be able to take the full circle trail through Leidarendi, covering 900 meters. Those who have a strong sense of adventure will particularly enjoy that part of your exploration will involve a degree of clambering and crawling.

Once the caving component of your journey is done, you’ll be driven to Silfra, your snorkeling site for the afternoon. This freshwater spring is between the tectonic plates in Thingvellir National Park, a UNESCO site with beautiful nature and fascinating history.

You’ll get ready in the car park and can choose between wearing either a wetsuit or a drysuit. Wetsuits will provide you with a greater degree of flexibility and will allow you to free dive. In contrast, drysuits are warmer, keep the water off your body entirely, and are very buoyant. Once you and your group are ready, you’ll head to the steps and enter a magical underwater world.

The vividness of the blues, the hundred meters of visibility; the geological marvels; and the cathedral-like spaces all defy belief. To make the journey even more pleasant, a gentle current will push you through the ravine, requiring minimal exertion for those who want just to relax and float along.

Additionally, one of your guides will dive as you snorkel to take photographs of you, providing you with some incredible souvenirs.

Explore an incredible subterranean world on the same day as you marvel over an underwater one by booking this fantastic combo tour. Check availability by choosing a date.

Read more


Caving in Leidarendi
Caving equipment including helmet and light
Snorkeling tour
All snorkeling equipment
FREE photos for snorkeling
Hot chocolate for snorkeling
Pick up and drop off
English speaking guide
Thingvellir National Park Fee



What to bring

Clothes suited to dress under a drysuit such as long warm underwear or sweat suit, warm socks OR
Clothes suited to dress under a wetsuit such as swimsuits
Warm clothes to wear prior and after the snorkeling
Water Resistant outer layer as it can be wet inside the cave
Lunch or Snack
You can rent a GoPro camera from us

Good to know

Prerequisites for this tour:

Be at minimum 145cm (4’9) tall / maximum 200cm (6’7) tall

Be at minimum 45kg (99 lbs) / maximum 120kg (264 lbs)

Be able to swim and be comfortable in water

Be physically fit

Not pregnant

Be at least 14 years of age


Please note that should you have any neurological, circulatory, or respiratory problems or underlying diseases, battled any illnesses, or have any physical problems you might have to turn in a physicians allowance to participate in this tour. If you are over 45 and partake/have partaken in pipe smoking or heavy alcohol intake, you might need a medical waiver. If you are over 65 years of age, you need a medical waiver. Please contact the operator for further information and application papers.

Read more

Similar tours

Link to appstore phone
Install Iceland’s biggest travel app

Download Iceland’s biggest travel marketplace to your phone to manage your entire trip in one place

Scan this QR code with your phone camera and press the link that appears to add Iceland’s biggest travel marketplace into your pocket. Enter your phone number or email address to receive an SMS or email with the download link.