8Yellowstone National Park, Wyoming, Montana, Idaho

Yellowstone, established in 1872, holds the distinction of being the first national park in the world.

Renowned for its geothermal features, including the iconic Old Faithful geyser, this park is a hotbed of geysers, hot springs, and bubbling mud pots. Its expansive wilderness is home to diverse wildlife, from grizzly bears and wolves to bison and elk, making it a haven for nature enthusiasts and photographers alike.