Grand Prismatic Hot Spring, Wyoming
This hot spring is the third largest in the entire world, but easily number one for most beautiful. The astounding colors are the result of pigmented bacteria that grow around the edges of the mineral-rich water. The colors match the rainbow emitted by a crystal prism: red, orange, yellow, green, and blue, giving the geyser its name.
The Grand Prismatic is in the heart of Yellowstone National Park, also home to the world’s largest collection of geysers and one of the most beautiful parks on the planet. But one of the highlights of your visit will be the glistening waters of the hot spring, accessible via a raised path.