
- Bathing temperature
- 39°C
- Bathing
- Outdoor
- Established
- 1891
Gamla Laugin — "the old pool" — was built at Flúðir in 1891 and is the oldest swimming pool in Iceland. Restored and reopened as the Secret Lagoon, it keeps its rough stone edges, gravel floor and the little geyser that erupts nearby every few minutes.
Balnevia view
Why visit
A deliberately unpolished alternative to Iceland's designer lagoons: natural bottom, constant 38–40°C water, and steam drifting across the surrounding geothermal field.
Recommendations
Hotels nearby
Explore places to stay near Secret Lagoon (Gamla Laugin).
The water
Thermal water
- Source
- Flúðir geothermal field
- Mineralisation
- Silica-bearing geothermal water
- Character
- Constant 38–40°C water fed from adjacent hot springs and a small regularly erupting geyser.
Practical information
On the Golden Circle route, so it is busiest in the afternoon. A short boardwalk loops around the hot springs that feed the pool.
Location
Related places
More thermal baths in Iceland

Grindavík/Iceland
Blue Lagoon
Milky, silica-rich geothermal water set in a black lava field on the Reykjanes peninsula.
Bathing temperature 38°C

Reykjavík/Iceland
Sky Lagoon
An oceanfront geothermal lagoon on the edge of Reykjavík, with an infinity edge to the North Atlantic.
Bathing temperature 39°C

Laugarvatn/Iceland
Laugarvatn Fontana
Geothermal steam rooms built directly over natural vents on the shore of Lake Laugarvatn, with pools opening onto the water.
Bathing temperature 40°C