Blue Lagoon Iceland
Grindavík, Iceland
Don't just relax in a hot tub — unwind in one of the world's biggest at Blue Lagoon Iceland. This natural geothermal spa contains water that originates over a mile beneath the Earth's surface, collecting minerals of all kinds on its way up to the six-million liter lagoon that stays between 100º and 104º year-round. If you're looking for more than a soak, they also offer in-water massage, a lagoon-side bar, two restaurants — including one that's built into a lava cliff — and a clinic that offers overnight visits and a private lagoon.
