The Blue Lagoon is a geothermal spa near Keflavik Airport, fed by water from a nearby geothermal power plant. It’s Iceland’s most photographed attraction — and also its most expensive single activity for most travelers.
What you get
Entry includes access to the milky-blue lagoon, a silica mud mask, and use of changing facilities; higher tiers add a drink, a second mask, slippers, and access to a private lounge. The water sits around 37–39°C, and the setting — steam rising over black lava rock — is genuinely striking.
The downsides
It’s expensive (tickets must be booked in advance and routinely sell out), and it can feel more like a resort than a natural hot spring — because, functionally, it is one.
Quieter alternatives
The Sécret Lagoon near Flúðir, the Sky Lagoon closer to Reykjavik, and various municipal geothermal pools (present in almost every town) offer a similar warm-water experience at a fraction of the cost and crowd.
Our take
If it’s your only stop near the airport on arrival or departure day, it’s a reasonable way to use otherwise-dead time. If you’re trying to save money or avoid crowds, the alternatives are easily as enjoyable.
About Erika Sand
Erika has spent the last decade driving, hiking, and hot-spring-hopping across Iceland in every season. She writes NRF.is’s itineraries, guides, and trip reports to help travelers see the country safely, affordably, and without the tourist-trap detours.