reykjanes · Iceland
Seltún
About Seltún
Seltún is a vivid geothermal area on the Reykjanes Peninsula — a collection of boiling mud pools, steaming vents and sulfur-stained earth in shades of yellow, orange and red, easily accessible on a network of boardwalks.
History & Background
Seltún is part of the Krýsuvík geothermal system, one of several high-temperature geothermal zones on the Reykjanes Peninsula. In 1999, a major geothermal eruption destroyed a drill hole at Seltún and created a large new vent. A previous attempt at geothermal drilling in the 1970s was abandoned after local protests. The boardwalks allow close-up views of the boiling features safely.
Did You Know?
- Iceland generates about 25% of its electricity from geothermal energy
- Geothermal water heats about 90% of all buildings in Iceland
- Iceland has over 600 hot springs and 200+ volcanically heated areas
- The word "geyser" comes from the Icelandic word "geysa" meaning to gush
Tours Near Seltún
Best-rated Iceland experiences — book with free cancellation
Why Visit
Vivid yellow, orange, and green mineral deposits
Did You Know?
Part of the Krýsuvík-Seltún geothermal system
Legends of Seltún
Seltún has been part of Icelandic folklore for generations. Local tales speak of hidden people (huldufólk) and other supernatural beings who inhabit the area. According to tradition, this place deserves respect and visitors should be mindful of the ancient spirits who call it home.
Hidden Gems Nearby
Steam Patterns
Watch how the steam patterns change with wind direction and temperature throughout the day.
On cold mornings, the steam is most dramatic, creating an otherworldly atmosphere that photographs beautifully.
Mineral Colors
Notice the vivid colors around the geothermal features — yellow sulfur, red iron oxide, and green algae.
These colors represent different minerals deposited by the hot water, creating a natural palette unique to each hot spring.
Bubbling Mud Pots
If present, the bubbling mud pots are mesmerizing to watch — each bubble is a small volcanic event.
The mud is created by acidic steam breaking down the surrounding rock, and each site has a unique bubbling rhythm.
Practical Information
Best Time
Year-round
Duration
20–30 minutes
Access
Off Route 42 at Krýsuvík, Reykjanes peninsula. Free parking, boardwalk paths.
Frequently Asked Questions
Is it safe to touch the geothermal water?
Never touch geothermal water unless at a designated bathing area. Water temperatures can exceed 100°C and cause severe burns.
Can I visit geothermal areas year-round?
Yes, most geothermal areas are open year-round. The steam is even more dramatic in cold winter weather.
Do I need to stay on boardwalks?
Yes, always stay on marked paths and boardwalks. The ground near geothermal features can be thin and unstable.
