Secret Lagoon at Fludir

The Secret Lagoon, known in Icelandic as Gamla Laugin, is a rustic geothermal pool in the village of Fludir and the oldest swimming pool in the country, built in 1891 and restored in 2005. Unlike the polished mega-spas near the capital, the lagoon is a natural-looking pool with a pebbled bottom, a small geyser that erupts every few minutes and a wooden changing house. Water flows in at about thirty-eight to forty degrees Celsius, giving a comfortable soak in any weather, and the surroundings are open fields, steam and sheep. It sits about one hour and fifteen minutes from Reykjavik, which makes it a natural stop on a Golden Circle day, between Gullfoss and the return to the city. The experience is relaxed and local in feel, with no swim-up bar or designer lounges, just good water and views of the countryside. In winter the pool can be a good place to watch for northern lights from the water on clear nights, and in summer the long light stretches the soaking hours late into the evening. Many Golden Circle tours include entry, and independent visitors can pair the lagoon with Kerid crater and the Fridheimar tomato farm.

Fludir is a farming village on the Hvita river, and its geothermal resource has long been used for greenhouses and heating. The Secret Lagoon was originally the village's first communal pool, where locals learned to swim in the 1890s. After decades of neglect, it was cleaned up and reopened in the early 2000s, with the original stone-lined edges kept in place. That sense of continuity is part of the appeal. The lagoon is not secret in the strict sense, but it does feel less staged than the better-known spas.

A visit follows a simple rhythm. Guests shower and change in the cabin, walk along a boardwalk to the pool, and settle in at a spot that suits their temperature preference: the water near the inflow is warmest, the far side slightly cooler. The small geyser, called Litli Geysir, bubbles every five minutes and gives a miniature version of the Strokkur show. Bring a towel, or rent one at the front desk, and take any valuables to the lockers. Drinks and light food are sold at the reception, so a longer soak is easy.

Timing makes a difference. Midday is busiest when tour buses arrive; early morning and evening tend to be calmer. Winter evenings reward patience with a chance to see aurora overhead from the water, and the cold air makes the pool feel even warmer. In spring and autumn the surrounding fields change color and the lagoon is a good place to rest between sightseeing stops. For a full day, combine it with Kerid crater, Fridheimar tomato greenhouse lunch, Gullfoss and Thingvellir.

For an easier day, book a small-group tour that includes entry and transport. Either way, rinse thoroughly before entering, keep hair tied up and drink water before and after the soak. Food and drink are simple, with a small cafe at reception, so many visitors eat in Fludir village or at a nearby farm restaurant before or after. Bring a plastic bag for wet swimwear, and remember that the lagoon is a natural-style pool, so the bottom is pebbly and water shoes can be useful for sensitive feet.