The Strytur in are giant submarine geothermal silica cones that rise like towers from the seafloor at Ystuvik and Arnarnes in the fjord Eyjafjordur in North Iceland.
Ystuvikurstrytur are the deeper and its heat is about 72 degrees. The area of Arnarnesstrytur is shallower but wider. The water at Arnarnessstrytur has been measured as warm as 78 degrees. The Strytur also feature unique wildlife. Many consider it to be one of the best dives in the world.