"Nestled within a landscape of moss and lava less than an hour from Reykjavik, the Ion Adventure Hotel is one of the few true luxury hotels outside of Iceland’s capital.Under the careful eye of owner Sigurlaug Sverrisdóttir, a no-frills barracks for geothermal power plant workers was transformed into a concrete-and-glass Nordic-modern showpiece that wears its reverence for the natural setting on its sleeve. Sverrisdóttir is committed to using local products—everything from the artwork to the bath products to the food are sourced from the area—and the hotel’s sustainable materials and practices, like using geothermal cooling for power, have earned it a number of awards. Plus, all 45 of the sleek but comfortable rooms feature fair-trade organic linens and floor-to-ceiling views of Lake Thingvellir or Mount Hengill, an active volcano. The glass Northern Lights Bar juts out toward the horizon, providing a perfect viewing spot when the aurora borealis appears; beneath it sits a large rectangular hot tub adjacent to the spa. As for adventure, the hotel is happy to arrange any number of excursions, including fly-fishing, horseback riding, kayaking and, for the truly bold, snorkeling in the Silfra fissure."