9Blue Lagoon Retreat – Iceland

Iceland may be frigid in winter, but the Retreat at Blue Lagoon is one of the most indulgent warm experiences imaginable.

Guests enjoy private access to the hotel’s serene geothermal lagoon, where warm mineral-rich waters glow turquoise beneath black lava cliffs. The subterranean spa—carved into volcanic rock—offers a signature ritual built around silica, algae, and healing minerals. Floating in a steaming lagoon while snowflakes melt on your skin is an experience that feels otherworldly, soothing, and undeniably luxurious.

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