Retreat at Blue Lagoon

After its economy melted down in the late 2000s, Iceland invested heavily in tourism, which may be why your Instagram feed is dotted with people dipping into the creamy alien waters of the Blue Lagoon. Now the country’s most popular attraction has its own hotel, carved into an 800-year-old lava flow. It features a gourmet restaurant, a subterranean spa and 62 rooms, four of which are suites with access to private pools of the lagoon. —Kaitlin Menza