If you are a railroad buff and like especially steam locomotives and historic railroads, Colorado is definitely the place to go for.
The Cumbres & Toltec Scenic Railroad (C&TS) is a 3 ft (914 mm) narrow gauge heritage railroad running between Chama, New Mexico and Antonito, Colorado. It runs over 10,015 ft (3,053 m) Cumbres Pass and through Toltec Gorge, from which it takes its name. Trains operate from both endpoints and meet at the midpoint. Today, the railroad is now the highest narrow gauge steam railroad in the United States. (source: Wikipedia)
During the trip from the Great Sand Dunes to our next destination we followed partly this railroad between Antonito, CO and Charma in New Mexico. Right at the moment when we reached Cumbres Pass the train left the station and gave us just a few seconds to make a couple clicks.