Grand Canyon is considered one of the finest examples of arid-land erosion in the world. Incised by the Colorado River, the canyon is immense, averaging 4,000 feet deep for its entire 277 miles.
The Phoenix Zoo opened in 1962 and is the largest privately owned, non-profit zoo in the United States.
OdySea Aquarium in Scottsdale, Arizona, is a marine aquarium, and the largest aquarium in the Southwest United States.
Horseshoe Bend is a horseshoe-shaped incised meander of the Colorado River located near the town of Page, Arizona, United States. It is also referred to as the "east rim of the Grand Canyon."