Every president in history is immortalized in bronze in downtown Rapid City.

Thanks to a loophole in property ownership, this alleyway has become a cacophonous street gallery.

The first declared National Monument in the United States.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

Most-visited and most-photographed slot canyon in the American Southwest.

Dramatic river bend surrounds a natural red-rocked pedestal.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A registered historic landmark shrouded in unsettling local legends.

The final resting place of infamous outlaw Clyde and Marvin Barrow.

This small town Texas cemetery is said to be the burial site of a UFO pilot who crashed in the 1800s.