The Retreat Spa at The Retreat Hotel is an exclusive geothermal wellness sanctuary built into an 800-year-old lava field beside the world-famous Blue Lagoon in Grindavik, Iceland. Spanning 1,000 square metres and subterranean in design, the spa features seven treatment rooms with floor-to-ceiling windows overlooking the lagoon or lava fields, alongside a sauna, lava spring, steam cave, cold plunge well, and the mineral-rich geothermal waters of the private Retreat Lagoon. Signature treatments include the iconic Blue Lagoon in-water massage — one of the world's most unique spa experiences — along with the Blue Lagoon Ritual, float therapy, silica and algae body therapies, and traditional facials. The private Lava Cove lounge provides a completely secluded retreat within the spa, with a private lagoon, fireplace, and complimentary refreshments. Entirely powered by geothermal energy, The Retreat Spa offers a profound encounter with Iceland's volcanic landscape and the ancient healing qualities of its extraordinary geothermal waters.