One of the highlights of our tour to the Uyuni Salt Flats in Bolivia was to visit the colored lagoons. The lagoons are located in the middle of the desert and at a very high altitude, usually above 5000 meters (16000 ft). They come in different colors, green, blue and even red, depending one what kind of algae they have in them. Both my wife and I liked the red lagoon the most, it was just such an unusual color to see and it was a beautiful sight nonetheless. My sat there for almost an hour just to admire the view.