Secret Lagoon
The oldest swimming pool in Iceland, dug in 1891, left to go wild and then reopened.
Updated 30 August 2026
Gamla laugin at Fludir was built in 1891 and is the oldest swimming pool in Iceland, made where hot springs come out of the ground beside the Litla-Laxa river; swimming lessons were taught in it for decades, at a time when very few Icelanders could swim at all. It was abandoned in the middle of the twentieth century as newer pools opened, silted up, and was restored and reopened for bathing in 2014. The water sits around 38 to 40 degrees and comes straight from the springs, which still bubble and steam around the edge; a small geyser beside the pool erupts every few minutes.
The main sights
- A pool from 1891 - the oldest in Iceland, restored and reopened.
- Springs around the rim - the water arriving direct and unfiltered.
- A small geyser beside it - erupting every few minutes.
- Natural stone edges - kept rather than tiled over.
When to go
Year round; evenings are quieter. Two to three hours.
Practical notes
It is far smaller than the Blue Lagoon and books out - reserving ahead is effectively required in summer. Facilities are simple, and showering before entry is compulsory as everywhere in Iceland. The name is a marketing one; it is not a secret.
Nearby
Geysir is north; Hrunalaug is minutes away outside the village.
Key facts
Source: Wikidata, item Q27016704, read on 18 October 2026.
What to pack for Secret Lagoon
Chosen from what this place is for. Tap a kit for the full checklist.
- Reef-safe sunscreen - High SPF that will not bleach the coral you are swimming over. Find on Amazon
- Comfortable walking shoes - Sightseeing means kilometres of pavement and cobbles daily. Find on Amazon
- Swimwear - Needed at most public thermal pools; some traditional baths are nude and single-sex. Find on Amazon
- Quick-dry towel - A microfibre towel packs small and dries in minutes. Find on Amazon
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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.