The top of a giant mesa, just outside of Amarillo, appears to float in the sky above.

A collection of beautiful crystals shaped like freshly plucked roses.

At Oklahoma Panhandle State University, a plaque marks a place once known as No Man's Land in the linear world and the fictional Kcymaerxthaere as well.

A larger-than-life monument to the overlooked women who braved Western expansion and broke down societal barriers.

This giant tower beacon was a key navigation tool for pilots delivering mail amid the night skies.

An Idaho legend carved out a cave village with his own two hands.

A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

Curios, scientific antiques, oddities for sale.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A ghost town that held steady longer than most, but finally gave up the ghost.

The location of Puerto Rico's first water bottling plant, thanks to a collaboration between Mother Nature and technology.

This 20th-century mansion plays a key role in one of Puerto Rico's greatest novels.

The highest peak in Puerto Rico is home to a rare fern that can only be found on six trees at its summit.

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.