Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.

Possibly the world's only drive-in movie theater with an attached motel.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Site of the 1879 Cheyenne Outbreak and the site where famed Sioux chief Crazy Horse met his fate.

A rancher expanding a natural spring for his cattle came up with bones – lots and lots of them.

An experimental, automotive replica of Stonehenge.

The United States's largest hand-dug well is topped with a state-of-the-art museum.

The world’s largest combined collection of U.S. and Russian aircraft got its start in a poultry building.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

A mysterious spirit totem at the edge of Navajo lands.

The ruins of the movie ranch owned by actor and stuntman Ray "Crash" Corrigan.

The Los Angeles flood disaster that took 400 lives and ended the career of William Mulholland.

A relic from a forgotten bakery chain still spins atop a diner.

These memorials built by an eccentric bachelor on the side of Interstate 5 cause both wonder and traffic accidents.

This natural marble cave is one of only five national monuments in Oregon.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

According to legend, you must remain completely silent while passing this man-made mound or suffer the consequences.

On the Oregon coast there is a natural hole that seems to be draining the sea.

The highest point in Washington state is a volcano covered in glaciers.

This sci-fi gazebo located in a Washington power town is made from old bits of industrial electrical equipment.

The illuminated falls are a gem in North Cascades National Park.