Located in Iceland is the widely popular and beautiful Blue Lagoon Geothermal Spa. It was recently voted ‘the best medical spa worldwide’ by Conde Nast Traveller and recognized as one of National Geographic’s 25 ‘wonders of the world’. The massive lagoon holds six million liters of geothermal seawater (at a temp. of 98-102°F), which is renewed every 40 hours. A few other amenities include two steam baths, a sauna, a waterfall, an enormous dining room, and a gorgeous view of the blue lagoon from about anywhere in the house.