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

Strange red rock formations that have been attributed to a higher power for hundreds of years.

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

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

Ecuador’s historic seat of government has been quietly looted in recent decades, and no one knows how or by whom.

This overlooked, beautiful convent hides an original Hieronymus Bosch among its many treasures.

Building this tragically pointless stone barrier cost the lives of the prisoners made to build it.

Legend says if this neo-Gothic basilica is ever officially completed, the world will come to an end.

Massive volcano in the Andes is the farthest point from earth's center.

These mammoth-yet-narrow crevasses in the Earth are perfect for taking an otherworldly swim.

A swing to dangle you off the very edge.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

An optical illusion found amid a logged redwood forest.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

An ever-growing collection of rare and strange objects owned by local Arkansas illusionist Maxwell Blade.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

The only diamond mine in the world where you can keep what you find.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

The highest peak in Utah is the hardest to reach, but only if explorers choose the hard way.

Visitors to this library are in for a real-world education in modernist architecture.

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

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

The fifth-longest natural arch in the world, and the longest outside China.