Venezuela's Angel Falls isn't just any waterfall—it's the world's highest uninterrupted waterfall. For scale, imagine Niagara Falls...now multiply that by 15. Angel Falls measures 3,212 feet (979 meters), with the longest single plunge coming in at a lengthy 2,648 feet (807 meters). Set in Venezuela's Guayana Highlands, the massive natural wonder drops over the edge of Auyantepui mountain in the Canaima National Park, a UNESCO World Heritage site. The mountain's mesa (called a Tepui by the natives) is one of more than 100 of its kind in the highlands. The massive table mountains are formed from sandstone and are being continually eroded and changed by the area’s heavy rainfall. The falls weren’t actually named for any celestial messengers but for a James ('Jimmie') Crawford Angel, an adventurous pilot from Missouri who saw the waterfall while searching for gold in 1933. A few years later, he tried to land his plane there and failed, making an 11-day trek to civilization and drawing plenty of scientific and tourism interest to the region in the aftermath of his adventure.