The highest bridge in America was built for an almost unnervingly small amount of money.

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

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

One of the smallest towns in the United States.

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

The only retired U.S. nuclear missile silo that is open to the public.

A mural and a few historical markers commemorate Denver's once-thriving Chinatown, which was obliterated in a racist riot.

One of three remaining theatres in the United States created in the Art Deco Mayan Revival style.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

A technicolor place of worship for Elevationists.

A Buddhist monastery tucked away in the mountains of Colorado.

Built in 1981 in collaboration with Andy Warhol, this giant piece of pop art stands on the campus of Colorado State University.

A Colorado store that specializes in all things spiritual, metaphysical, and witchy.

See 150 million-year-old dinosaur tracks and bones dating back to the Jurassic period.

On the edge of grassland in northeastern Colorado, these rock formations are some of the few remnants of a high plain that has eroded away over millions of years.

Check out a hidden collection of vintage neon signs.

Ute tour guides have been sharing the ancient dwellings and rock art inside this large park with visitors for more than 40 years.

The world's largest washing machine collection has more than 1,400 antique items in its exhibit.

Take a dip in the world's largest mineral hot springs pool.

This remote Colorado canyon is home to the second-largest collection of natural arches in the world.

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

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

Isak Heartstone, a 15-foot wooden troll made out of recycled materials.