Specifically relating to Yellowstone National Park in Wyoming, this stamp is part of the group of stamps honoring the National Park Service Centennial.

Yellowstone offers truly unique experiences like spectacular hiking trails, beautiful views, Old Faithful, and geysers shooting water 100 feet into the air.

When the first visitors to Yellowstone tried to report what they saw, news magazines responded, “Thank you, but we do not print fiction.” Peppered with colorful hot springs, mudpots, and breathtaking waterfalls, it is easy to understand how one might think it otherworldly. Nothing else on Earth is quite like Yellowstone--and there is something for everyone, from children to grandparents.

Established in 1872 and located primarily in Wyoming, Yellowstone National Park was America's first national park. To this day, Yellowstone remains one of the country's most popular national parks with millions of annual visitors. Yellowstone spans almost 3,500 miles, and extends into parts of Montana and Idaho, making it one of the largest national parks in the US.

Yellowstone National Park sits on top of a dormant volcano and is home to more geysers and hot springs than any other place on earth. Wonders abound at this truly unique national park, from sites like the Yellowstone Grand Canyon to wildlife like America’s largest buffalo herd, grizzly bears, and wolves. Approximately 50 percent of the world’s hydrothermal features are at Yellowstone National Park, creating an effect that makes the ground appear to be on fire. The most famous of all the geysers is Old Faithful, one of the most popular and recognized natural wonders in the United States.