Looking at the strange landscape you think to yourself, 'This can't be natural'. In which case you'd be partially right. Iceland's “Blue Lagoon” (no relation to the Brooke Shields movie) is actually the run off of a power plant. Okay, I know that sounds weird, but this is Iceland, and power plants there are much different. The perfectly heated silica and sulfur rich waters that fill the lunar-esque lava field are the output from a nearby geothermal power plant.
Located a short drive from the international airport, the Blue Lagoon, (Bl?a L?ni_ in Icelandic) is one of the most popular tourist spots in the whole country. Several package deals are available that include a bus ride to or from the airport, so it's either the perfect start to an Icelandic vacation, or the perfect end.
Steam huts, saunas, a fully loaded spa and a cafe in modernist Scandinavian architecture surround the steamy 104 degree pools that really are an otherworldly blue color. And even if the air outside is below freezing, it's only a short walk from the warm showers to the extra warm pool. So apply some silica soil to your face (they say its good for the skin), float around in the amazing relaxing waters, and mingle with locals and tourist alike. Or find a private pool or corner and take in the experience, although you might have to remind yourself that you're still on the same planet.