Capulin Volcano National Monument (U.S. National Park Service) Part of the 8,000 square mile Raton-Clayton Volcanic Field, Capulin Volcano showcases the volcanic geology of northwestern New Mexico. The views are spectacular day or night, with views of 4 different states from the volcanic rim and one of the darkest night skies in the country.Whether it's a quick stop or a day's trip, enjoy exploring the landscape of this unique volcano! National Monument. National Park Service Logo. Learn about the Natural Side of Capulin.