Take a day trip on the Cumbres & Toltec Scenic Railroad, an 1880s steam locomotive that chugs through portions of Colorado's and northern New Mexico's rugged mountains that you can't reach via roads. It's the country's longest and highest narrow-gauge railroad. The company offers two round-trip train routes—either Antonito to Osier or Chama, NM. to Osier—plus several bus-and-train combinations and one-way trips. Cumbres & Toltec offers themed rides, including a special Christmastime train ride called "The Cinder Bear."