Northern Arizona has more than its fair share of natural attractions, and while most of the region's big holes in the ground were created by the slow process of erosion, there is one hole that has far more dramatic origins. At 550 feet deep and 2 1/2 miles in circumference, the Barringer Meteorite Crater is the best-preserved meteorite impact crater on earth. The meteorite, which estimates put at roughly 150 feet in diameter, was traveling at 40,000 mph when it slammed into the earth 50,000 years ago. Within seconds, more than 175 million tons of rock had been displaced, leaving a gaping crater and a devastated landscape. Today, you can stand on the rim of the crater (there are observation decks and a short trail) and marvel at the power, equivalent to 20 million tons of TNT, which created this otherworldly setting. In fact, so closely does this crater resemble craters on the surface of the moon that in the 1960s, NASA came here to train Apollo astronauts.

On the rim of the crater, there's a small museum that features exhibits on astrogeology and space exploration, as well as a film on meteorites. On display are a 1,400-pound meteorite and an Apollo space capsule. Throughout the day, there are 1-hour hiking tours along the rim of the crater.