Meteor Crater
This natural landmark is the Meteor Crater in Coconino County. The creator is 3,900 feet (1,200 meters) in diameter and 560 feet (170 meters) deep. Scientists believe the creator is 50,000 years old and was struck by a nickel-iron meteorite 160 feet (50 meters) across. Scientists have profusely studied the crater since the 19th century. Also, in the 1960s and 1970s, NASA trained astronauts inside. Barringer Crater Company currently owns the site.