Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

This unique tower has been home to malaria-fighting bats for 100 years.

In a small Japanese garden off a busy Denver street, a memorial to a brave, principled politician.

The huge collection of paintings of the American West is one of Denver's best-kept secrets.

The site of the "Bone Wars" between two rival paleontologists during the dinosaur rush of the 19th century.

The narrow mountain road that carves a path between Florence and Victor is tied to ghost towns and ghost stories.

Inside this casino, visitors are treated to slot machines and a rare German Christmas pyramid.

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

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

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

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

A museum packed with instruments, lyrics, and other mementos of the American folk icon.

This 24-acre park offers a place for meditation in the midst of Sedona's iconic red rocks.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

A spiritual vortex among the red rocks in Sedona.

Limestone caves with spectacular showcase chambers.

It would be easy to walk past this unusual piece of art and have no idea it pays tribute to the odd life of a real chicken.

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

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

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

A tunnel with windows, so you don't miss out on the impressive views.

This railroad tunnel was once the longest in Massachusetts.

Abandoned anti-ballistic missile base.

A haunted hill that supposedly defied gravity.