Southwest
Grand Canyon National Park
Arizona
One of the world's most awe-inspiring landscapes, the Grand Canyon exposes 2 billion years of Earth's geological history in its layered bands of colorful rock.
1.2M acres
6,380,495 visitors/yr
Southwest
Petrified Forest National Park
Arizona
Petrified Forest contains the world's largest concentration of petrified wood, scattered across a colorful badlands landscape from the age of dinosaurs.
221,415 acres
644,922 visitors/yr
Southwest
Saguaro National Park
Arizona
Saguaro protects the iconic giant cactus of the Sonoran Desert, where these towering sentinels can live 200 years and grow 50 feet tall.
91,716 acres
888,759 visitors/yr