Capulin Volcanic National Monument - http://www.nps.gov/cavo/

Mammoths, giant bison, and short-faced bears were witness to the first tremblings of the earth and firework-like explosions of molten rock thousands of feet into the air. Approximately 60,000 years ago, the rain of cooling cinders and four lava flows formed Capulin Volcano, a nearly perfectly-shaped cinder cone, rising more than 1000 feet above the surrounding landscape. Although long extinct, Capulin Volcano is dramatic evidence of the volcanic processes that shaped northeastern New Mexico. Today the pine forested volcano provide habitat for mule deer, wild turkey, and black bear.