Tent Rocks National Monument (Kasha-Katuwe)

Forty miles southwest of Santa Fe, on land managed jointly by the Bureau of Land Management and Cochiti Pueblo, cone-shaped formations of pumice and tuff rise up to 90 feet — the eroded remnants of pyroclastic flows from the Jemez Mountains that occurred 6 to 7 million years ago. The Keresan name, Kasha-Katuwe, means "white cliffs." President Clinton established it as a national monument in January 2001. The 1.5-mile Slot Canyon Trail climbs 630 feet to a lookout; the monument is closed to dogs and open for day use only.