Arches National Park

Location: Utah

Year Established: 1929

Area: 76,518.98 acres (309.7 km2)

Annual Visitors: 1,284,767

This site features more than 2,000 natural sandstone arches, including the famous Delicate Arch. In a desert climate, millions of years of erosion have led to these structures, and the arid ground has life-sustaining soil crust and potholes, which serve as natural water-collecting basins. Other geologic formations are stone columns, spires, fins, and towers.