Geyser Yellowstone National Park T-ShirtYellowstone National Park is a nearly 3,500 square mile wilderness recreation area atop a volcanic hot spot. Mostly in Wyoming, the park spreads into parts of Montana and Idaho too. Yellowstone features dramatic canyons, alpine rivers, lush forests, hot springs and gushing geysers, including its most famous, Old Faithful. Everyone will know you are a fan when you wear this Geyser Yellowstone National Park T Shirt!