Hot springs
Mud pots
Fumaroles
Steam vents
Boiling water
Sulfur deposits
Parking
Warning signs
Stay on marked paths
Geothermal features
An extensive high-temperature geothermal area with steam vents, mud pots, fumaroles and sulphur deposits within an active volcanic system.
Safety
Geothermal ground can be extremely hot, thin and fragile. Follow marked routes and respect closures and warning signs.
About Theistareykir Geothermal Area
Theistareykir is an extensive high-temperature geothermal area in Northeast Iceland, shaped by steam vents, mud pots and colourful geothermal ground. The area lies within an active volcanic and fissure system and clearly reflects the powerful geothermal activity beneath the surface. Rising steam and varied geological formations make it an interesting destination for visitors and geology enthusiasts. Geothermal ground can be fragile and dangerously hot, so visitors should stay on marked routes and respect any closures.
Last verified 18 September 2026 Source