47. Grand Prismatic Spring – Yellowstone National Park, Wyoming
Yellowstone National Park has a lot of natural wonders to behold, but some of the most treasured sites are their natural geysers and springs. The Grand Prismatic Spring is no different: it looks like a giant geode that has been sunk into the earth, refracting all colors of the rainbow (via Fodors). It’s one of the largest natural hot springs in the park and the third-largest globally. The color explanation is the bacteria that live within the spring, causing the different hues of reds and yellows (via Fodors).