2The Retreat at Blue Lagoon – Iceland

Though Iceland is cold in winter, the Retreat at Blue Lagoon is one of the world’s warmest and most luxurious spa experiences—literally and aesthetically.

Guests have access to the mineral-rich Blue Lagoon geothermal waters as well as the ultra-private Retreat Lagoon, where milky-blue warmth meets dramatic volcanic scenery. The subterranean spa carved into black lava rock offers cleansing silica, algae, and mineral rituals that nourish the skin and relax the entire body. Floating in a steaming lagoon while snow falls around you is winter escapism at its most magical.