Whenever anyone mentions anything about a blue lagoon, all we can think about is that creepy Randal Kleiser film from the 80s–you know, the one with a young Brooke Shields. But, this blue lagoon on the shore of Iceland looks more like something out of a sci-fi flick, even though it’s all very real. The Blue Lagoon is Iceland’s most popular attraction, likely due to the fact that the water maintains a perfect 102 degrees. The water is fed by Svartsengi, the geothermal power plant that’s nearby, and the water is replaced every two days, so it’s always fresh. Contained within the natural waters are many vital minerals which have been “proven to include a medicinal bonus.” The lagoon gets its blueish glow from the minerals contained within the white silica mud, which is also the reason for the water’s milky appearance.