Landmannalaugar, located within the Fjallabak Nature Reserve in Iceland’s southern highlands, is a geological wonderland unlike any other place on Earth. Only accessible during the summer months via specialized F-roads (challenging mountain tracks that often require river crossings), it is the definition of an adventurous escape. The region is famous for its surreal, multi-colored rhyolite mountains, which shift in hue from ochre and red to blue and green, depending on the sunlight and mineral content. A hike here weaves through obsidian lava fields, steaming geothermal vents, and clear blue lakes. After a day of trekking, nothing is more culturally authentic or physically rewarding than soaking in the natural hot river that flows right past the campsite, surrounded by the untouchable highland wilderness.