Iceland has dozens of natural hot springs scattered across the landscape — geothermally heated rivers, pools and pots that require no facilities, no booking, and sometimes no other people at all. They are the polar opposite of the Blue Lagoon: free, raw, sometimes a hike to reach, and entirely on you to find. For visitors willing to put in a little effort, they are easily the most memorable bathing experiences in Iceland.
Natural hot springs are not temperature-controlled. Some are dangerously hot — hot enough to cause serious burns within seconds. Always test the water with your hand before getting in, and never enter a spring near an active geothermal area without checking that it is safe. If in doubt, do not get in. People have been seriously injured and even killed in unsafe Icelandic hot springs. Treat the heat with respect.
Reykjadalur — the easy classic
A 3 km hike south of Hveragerði (an hour from Reykjavík) leads to a geothermally heated river where you can bathe in the open air. The water temperature varies — hotter as you go upstream, cooler downstream — and there are wooden changing screens along the bank. No facilities beyond that. It is free, beautiful, and the hike up through the steaming valley is half the experience.
This is the most accessible wild hot spring experience in Iceland and a great introduction. The trail is well-marked, the parking lot is free, and you can do the whole thing in 3–4 hours from Reykjavík. See guided Reykjadalur tours →
Landmannalaugar — the spectacular one
Deep in the highlands, Landmannalaugar is where a hot spring meets a cold stream to create a perfectly tempered natural pool surrounded by extraordinary rhyolite mountains in shades of red, orange, and green. It is remote — only accessible by 4WD or highland bus in summer — but it is one of the most spectacular natural bathing spots on earth.
Bonus: it is also the starting point for the famous Laugavegur hiking trail, so you can build a longer trip around it.
Seljavallalaug — the abandoned pool
A man-made concrete pool built in 1923, fed by a natural hot spring, tucked into a green valley below the Eyjafjallajökull glacier on the South Coast. The pool is still there, the changing rooms are basic but functional, and the whole place has a slightly abandoned, slightly magical feel.
The water is lukewarm rather than hot (around 25–30°C), so this is a "swim" rather than a "soak". The maintenance has gone up and down over the years and the water is not always crystal-clear. But the setting is unforgettable. A 20-minute walk from the parking area, just off Route 1.
Krossneslaug — the end-of-the-world pool
At the very end of the road in Strandir, on the eastern edge of the Westfjords, sits a small geothermal pool right on the beach, looking straight out over the Arctic Ocean. There is a tiny changing hut, an honesty box for the entrance fee, and absolutely nothing else. It is one of the most remote and dramatic bathing locations in Iceland.
Getting there takes commitment — the last 80 km of the drive are on a gravel road, and you really have to want to be here. That is exactly why so few tourists do.
Hrunalaug — the small one with rules
A small farmer-owned hot pool on private land in South Iceland, near the Golden Circle. The setting — a stone pool fed by a natural spring next to an old turf-roofed shed — is incredibly atmospheric. But it is tiny: only fits a handful of people at a time, and on a busy day you may have to wait or move on.
The owner charges a small fee. Pay it. Do not be one of the people who skip the fee — there have been ongoing access disputes here exactly because tourists have not respected the place. Limit your time so others can have a turn, leave it cleaner than you found it, and follow any posted rules.
What to bring
- Swimsuit and a quick-dry towel — you will be changing outside or in a basic hut
- Sandals or flip-flops — the ground around the pools can be sharp, muddy, or icy
- A waterproof bag for valuables — there is no locker
- Drinking water — soaking dehydrates you faster than you would expect
- Warm clothes for after — getting out of a hot pool into cold Icelandic air is brutal if you are not prepared
- Cash for honesty boxes — some pools take it, even when it is "free"
Unwritten rules
- Respect private land. Many wild pools are on farmers' property. If a sign says "no entry", listen.
- Pay the fee if there is one — even if no one is watching. The honesty boxes are how access stays open.
- Pack out everything. Bottles, wrappers, tissues, anything. There is no bin.
- Do not use soap or shampoo in the natural pools. The water flows back into the ecosystem.
- Be quiet. Half the magic is the silence. Nobody wants to hear your bluetooth speaker.
- Limit your time at the small pools so others can also enjoy them.
The bottom line
Wild hot pots are the best bathing experience in Iceland — but they ask something of you in return. Effort to get there, respect for the land, attention to safety, and a basic understanding that "free" does not mean "use however you want". Show up prepared, leave the place better than you found it, and you will walk away with the most authentic Icelandic bathing memory you can have.