This cave system allegedly holds the "metallic library" of a lost ancient civilization.

Nestled in an unassuming residential area, this "forbidden forest" is rumored to spirit away those who dare to enter.

A trio of giant wooden megaphones turn up nature's volume in this Estonian forest.

Florence’s mother built a stairway down to her daughter’s coffin so she could comfort her during storms.

This popular park is home to a sea serpent sculpture that now overshadows the twisted history of its creation.

Some believe that this ancient mural depicts technology far ahead of its time, but in reality it's nothing quite out of place.

In a largely deserted ghost town, a little brick building recalls its history as a gold rush hub and haven for outlaws.

Hidden by the roadside in the Iya Valley, this gem brings together folk monsters and the region's unique geography.

A miniature village lies nearly forgotten in the forest by the side of a major highway.

A creepy statue of a hooded ghost hauls itself up from the water in a historic Lithuanian city.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

Off-limits and full of venomous pit vipers, Brazil’s Snake Island has a frighteningly apt nickname.

A cuddly version of a dark mythological creature now acts as the mascot of a town.

An abandoned village that resides along the mountains of the Aosta Valley.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

One of the oldest living oak trees in the Southeast.

A popular oddity on display in a stately building, offering a symbolic commentary.

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

This legendary "evil" doll has been haunting the citizens of Key West for over 100 years.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

The body of an unidentified woman, visible through a glass coffin, was discovered by accident.

The San Andreas Fault spectacularly offsets this creek.