This blowhole is supposedly caused by a trapped monster.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

This monument built by Japanese American immigrants spent decades underground.

Now a pedestrian bridge, this was once part of a narrow-gauge railroad that ran along the east coast of Kauai.

Every president in history is immortalized in bronze in downtown Rapid City.

This statue honors the author's groundbreaking family story.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

A monument celebrating the idea of reaching inaccessible places.

Sex curse discovered on ancient tablet in Cyprus.

Breathtaking Byzantine paintings cover the inside of this 12th-century church.

This former Cyprus flight hub is now a crumbling, abandoned ghost complex.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

This mosaic-covered bar is brimming with curated curios.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

World's largest collection of serial killer artwork and other macabre exhibits.

L.A.'s oldest operating bowling alley is a beautifully restored homage to its speakeasy days.

The final resting place of a space program monolith.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

This open-pit mine is now an abandoned symbol of Bisbee's copper-mining heritage.

This Old West hotel, the longest in continuous operation in the state of Arizona, is claimed to be haunted.

Inside this striking glass building, visitors can see thousands of dinosaur fossils in the positions that nature deposited them more than 150 million years ago.