Secret Lagoon tour from Reykjavik: the oldest pool in the country, out on the loop

The Secret Lagoon is the oldest built bathing pool in Iceland, and it looks it, in the best sense. There is no glass wall, no architecture to speak of and no view over a city. It is a rectangle of warm water in a field at Fludir, with a boardwalk around part of the edge, steam lifting off the surface, and geothermal ground bubbling away nearby. The operator describes the experience plainly: a relaxing soak in a pool filled with natural hot water coming from the surrounding hot springs.

That plainness is the point, and it is what a Secret Lagoon tour from Reykjavik sells. The lagoons closer to the city are designed environments with ritual steps and bars in the water. This one is a pool in the countryside where the water happens to come out of the ground warm. People who want a spa book elsewhere; people who want to sit in hot water under an open sky in the middle of a long day out book this.

The other half of the appeal is arithmetic. At $34 the admission ticket is the least expensive line on this entire site, and it is rated 4.7 across 2,139 reviews, which is a large sample for a pool of this size. Compare that with Blue Lagoon comfort admission at $148 or the Sky Lagoon pass at $123 and the gap is obvious.

Fludir is the practical catch. The pool is not in the city and there is no bus included with the ticket, so a Secret Lagoon tour from Reykjavik is the sensible option for anyone without a car. That is the whole reason the guided 10-hour day exists in the form it does.

With a car. Buy the admission ticket at $34 and drive. Fludir sits on the Golden Circle route, so the pool fits into a self-driven loop without any detour worth the name. This is the cheapest version of the day by a wide gap, and the flexible one: you decide how long you stay in the water.

Without a car. Book the guided Secret Lagoon tour from Reykjavik at $132. The day runs 10 hours, collects you in the city, takes in Thingvellir, the Geysir field with Strokkur, the Gullfoss waterfall and the Kerid crater, and finishes with the soak. The bathing is the last thing before the drive home, which is the right way round after a day on your feet.

The 10-hour figure is worth pausing on. Most full days that end in warm water on this site run 11 hours, because the pool they finish in is at Grindavik and that is a separate run of roughly 50 minutes from town. A Secret Lagoon tour from Reykjavik saves that hour outright, because the water is already on the route. If you are counting evenings rather than money, that is the strongest argument on this page.

If the loop itself does not appeal and you simply want warm water with transport attached, the fjord option is $164 for four and a half hours, rated 4.8 across 648 reviews. It is a shorter day in a different direction, with pools at the edge of the water rather than a field.

The morning is sightseeing. Thingvellir first on most departures, which is a level gravel path along the foot of a rock wall; then the Geysir field, where the waiting is part of the fun; then Gullfoss, which is loud and windy and has steps leading down towards the water. None of it is demanding, but all of it is outdoors and it adds up across a morning.

The early afternoon usually brings the Kerid crater: a short walk around a rim with a coloured lake at the bottom. By then most of the group has had enough standing about in the wind, which is exactly why the soak is scheduled last. A Secret Lagoon tour from Reykjavik is built around that shape — effort first, warm water afterwards, then the drive back in the dark or the dusk depending on the month.

In the pool itself there is no ritual to follow and no steps to work through. You change, you get in, and you stay in until the guide calls time. The operator mentions that in winter people look up hopefully from the water; what the sky does on any given night is weather, and nobody selling a ticket can tell you in advance.

One small practical note that changes the end of the day: bring your own towel unless you have checked otherwise. The admission listing sells the water, and does not name a towel or a drink among what it includes.

Two numbers frame this page: $34 for the water on its own and $132 for the water with ten hours of transport, four stops and a guide attached. Everything else on the site sits between or above them. The fjord pass at Hvammsvik is $83, the Sky Lagoon pass is $123, and Blue Lagoon comfort admission is $148.

Put the guided day against the other full days and it holds up well. The Silver Circle day with the Canyon Baths is $240 for 10 hours, the version of the loop that ends at the Sky Lagoon is $240 for 11 hours, and our top pick across the whole site, the minibus loop that ends at the Blue Lagoon, is $264 for 11 hours. A Secret Lagoon tour from Reykjavik is the least expensive of that group and the shortest of them.

The reason is not that it is a lesser day. It is that the pool at the end of it is a modest one that charges modestly, and that it sits on the route so no hour is spent reaching it. Those two facts are the whole explanation for the gap between $132 and $264.

Finally, read the inclusion line rather than the fare. Every listing here carries free cancellation, but only some of them name a towel, and none of the admission tickets includes transport. Those two lines decide more about how the day goes than any price comparison does.