Iceland has a plethora of geothermal pools, but Blue Lagoon is not quite like any of the others. This is both good and bad – there is far more to do here than at most other pools in Iceland, but it is also much busier and more crowded. However, Blue Lagoon easily lives up to its hype. Not always blue (this requires a blue sky, so expect milky white water on an overcast day), Blue Lagoon boasts a large network of pools at varying temperatures (find yourself a hot-water outlet to get some serious heat), excellent saunas, in-water massage treatments (incredibly relaxing), out-of-water beauty treatments and a good restaurant – try the sushi. While in the water, enjoy a complimentary silica face-and-body scrub, have a drink by the bar, or pick up a rejuvenating algae masque. Renting a robe is highly recommended, as the air gets pretty chilly in Iceland even in summer. For a novel experience, make use of the late opening hours (to midnight) during summer.