A short but powerful waterfall resides amid Colorado’s Great Sand Dunes.

When ecosystems collide in the arid Southwest.

This nearly abandoned town was once a thriving mining community until a series of fires.

The first railway tunnel to cross the Continental Divide and, at 11,523 feet, was once the highest railroad tunnel in the world.

All that remains of this once-booming mining town are the ruins of a saloon.

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.

This open-air reconstruction of an Old West town, a cross between a theme park and a museum, provides an immersive historical experience.

This hot dog-shaped diner has moved all around Colorado, never been to New York.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

This underfoot portrait is the work of a disgruntled painter inspired by a tragic poem.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

There are eight natural springs around town, each with a slightly different taste.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

This statue of an obscure comic strip hero stands as a tribute to patriotic service and a cautionary tale about embracing fads.

This massive home was constructed by one of the greatest conservationists in Colorado history.

Paleoamericans built these ancient walls high in the Colorado Rockies as part of an extensive hunting system.