The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

Dive bar built out of the remains of a whaling ship.

The clock that sets them all.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

This statue of an obscure comic strip hero stands as a tribute to patriotic service and a cautionary tale about embracing fads.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

This whimsical seashell-shaped place of worship was designed to blend into its surroundings.

A private home built to resemble the shape of a microscopic creature.

A store that sells all manner of bones, insects, and animal curiosities.

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

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

Home inspired by the crystal rock formation of the Emerald Estates.

The largest Star Wars collection in the world is its own galaxy of collectibles.

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

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

The haunting ruins of Jack London's dream house.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

An expansive and intricately restored mansion remains from over a century ago--and so do its ghosts.

The hundreds of movies and television shows shot in this high desert town are commemorated in a unique museum.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

Water of undetermined depth has attracted rare fish and cult leaders alike.

Dramatic river bend surrounds a natural red-rocked pedestal.