Seltún Geothermal Area is a fascinating and otherworldly place located on the Reykjanes Peninsula in Iceland. It looks like something out of a sci-fi movie, with its red gravel, steaming vents, and bubbling pools of mud. The area is part of the larger Krýsuvík geothermal area and is known for its geothermal activity caused by its location on the Mid-Atlantic Ridge. You can walk along well-maintained wooden walkways to observe the unique geological features and learn about the geothermal effects at work here. It's definitely a must-visit spot if you're in Iceland and want to experience something truly out of this world.