50 Travel Destinations Every American Simply Must Visit In Their Lifetime

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. 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.