A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

A 2,000-ton rock resting in a state of a delicate balance.

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

A rock maze opens up to a panoramic viewpoint at an abandoned mine full of ghost stories.

The United States's largest hand-dug well is topped with a state-of-the-art museum.

Crumbling ruins mark the site of a couple's grisly murder in the woods.

Denmark’s never-ending bridge.

These hellish-looking cliffs in the Canadian Arctic have been burning for centuries.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A mailbox that saved a nature reserve.

A bizarre house filled with an astounding array of collections.

Jurassic theme park in the small town of Erlian.

These Bronze Age rock carvings are among the oldest in the region.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

All that remains of this once-booming mining town are the ruins of a saloon.

Hidden in the hills is a mysterious stone structure, known only to a few.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Hidden deep in a forest is this geological wonder carved by glaciers.

Hidden high on a remote mountain peak is a humbling and mysterious Vietnam War memorial.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Each winter this underground cave forms a dazzling ice palace.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

European castle ruins in an American state park are actually the product of death and grief.

This abandoned bridge to nowhere stands secluded in the woods of a Cleveland suburb.