The basics: Zion National Park, in southwestern Utah, encompasses dramatic canyon country, where the Colorado Plateau, the Great Basin and the Mojave Desert meet. The Virgin River and its tributaries run through the park, dropping dramatically, and continue to carve sandstone, forming deep canyons, towers and cliffs at this popular park.

Visitors: 3.65 million people visited the park in 2015.

Square miles: 229.

Established: 1919.

More information: nps.gov/zion; 1-435-772-3256.