Yellowstone National Park

The world's first national park, Yellowstone is a sprawling wilderness atop a volcanic hotspot. It's famed for its otherworldly geothermal features like Old Faithful geyser and Grand Prismatic Spring, alongside the Grand Canyon of the Yellowstone River. The park is a premier wildlife sanctuary for grizzly bears, wolves, and massive bison herds. Offering over 900 miles of trails, vast forests, and alpine rivers, it provides an unparalleled concentration of natural wonders.

Its historical significance and sheer diversity of attractions make it the quintessential and highest-ranking park, though its popularity demands strategic planning to navigate crowds.