Yellowstone National Park US Bison Buffalo Vintage Souvenirs. Souvenir apparel for adventuring in to the wilderness of America's first National Park. With a hiking stick, map, guide, hat and gear an adventure with bison, buffalo and wolves awaits. Yellowstone National Park is located mostly in Wyoming with parts crossing in to Montana and Idaho. Yellowstone National Park is a volcanic hot spot and is home to America's most famous Geyser, hot springs, meadows, glaciers and wildflowers and forest. 8.5 oz, Classic fit, Twill-taped neck