Get ready for an unforgettable Icelandic experience where the journey is just as stunning as the destination. You'll embark on a rewarding hike of about 3.5 to 4 kilometers (roughly 60-90 minutes each way) through the beautiful Reykjadalur valley, which translates to "Steam Valley." The trail has some steep inclines, especially at the beginning, but the views of the dramatic landscapes, bubbling mud pots, and a gorgeous waterfall make it all worthwhile. Your prize at the end is a dip in a completely natural thermal river. Find a spot that's just the right temperature for you—the further upstream you go, the warmer it gets—and relax in the geothermal waters surrounded by incredible scenery.