The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

This pier made of ice and constructed over the Antarctic winter is used when the resupply cargo ships arrive in summer.

This western-themed amusement park is host to a large number of decaying animatronic cowboys.

Colin Stokes "got a bit carried away" and built a castle that looks like something out of Tolkien.

Stuck in a bygone era, the oldest subterranean shopping street in Japan hides beneath the popular Asakusa district of Tokyo.

Once home to a thriving oil industry, this town now sits eerily abandoned.

In the middle of a New England forest sit the crumbling ruins of World War II-era ammunition storage bunkers.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

This cave was once thought to be a hiding place for the devil.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

This former hunting grounds that once attracted U.S. presidents and other luminaries. Now it’s a privately owned research reserve dedicated to environmental sciences.

This maintained cabin is where Josie Morris, an occasional associate of Butch Cassidy, lived out the last 50 years of her life by herself.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

A 19th-century cabin built into a hollowed-out Sequoia tree.

On the Oregon coast there is a natural hole that seems to be draining the sea.

The decaying remains of a ship whose captain mysteriously disappeared.

Small caves once used as a hiding place for some of those accused during the Salem Witch Trials.

Daikon radishes are offered to the Japanese Buddhist counterpart of the Hindu god Ganesha at this historic hilltop temple.

A stately castle in the northern Italian countryside has been restored after years of neglect.

An architectural marvel that dates back to the zenith of Indian architecture.