Yellowstone, established in 1872, was the first national park in the world.
It is famous for geysers like Old Faithful, colorful hot springs, waterfalls and wildlife such as bison, elk, wolves and bears.
Pin Tip
Stay on boardwalks in thermal areas. The ground can be thin and the water dangerously hot.
When to Go
Summer is the most popular time. Many roads close in winter, when the park becomes a snowy wonderland.
Hours, fees and reservation rules change. Check official websites before you travel.