P.O. Box 168
Yellowstone National Park, WY 82190-0168
(307) 344-7381
www.nps.gov/yell
The first and oldest national park in the world, Yellowstone National Park is also one of the most popular. Attractions here include Old Faithful Geyser and some 10,000 hot springs and geysers, the majority of the planet's total.
