This three-mile concrete levee in Pueblo, Colorado was transformed into the world’s longest painting.

Located in the world's highest-altitude Dark Sky Community, this observatory welcomes amateur and professional astronomers alike.

The largest self-built castle in the U.S., six decades in the making.

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

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

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

The 7,000-foot finish line of America’s first Olympic Trials marathon.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

An eclectic collection of artifacts from the Wild West is preserved in a remote fictional pioneer town.

This otherwise unremarkable ski town building marks the site of Butch Cassidy's first robbery.

A quiet rock and botanical garden is the beautiful centerpiece of Fort Lewis College.

This spectacular track has run continuously since 1882.

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

This shrine is an ode to the region's rich Hispanic heritage.

A hotel with a rich Wild West history of miners and bootleggers.

Two tall rocks sit at the center of this site, once the home of a large Ancestral Puebloan community.

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

These aggressively sustainable art homes look like something out of 1970's science fiction.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

A small side chapel in Santa Fe's basilica is home to the oldest statute of the Virgin Mary in North America.

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

This giant pocket watch is the third iteration of a local landmark that has been standing just off the Santa Fe Plaza for over 100 years.

A sprawling collection of over 106,000 toys from around the world.