An astounding collection of medical specimens, including bits of President Lincoln.

At 207 feet, one of the world's longest continuous escalators.

A mysterious light in the wood, rumoured to be the the ghost of a railroad brakeman.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

A bizarre house filled with an astounding array of collections.

A onetime gangsters' hideaway where you can dine on steaks, fine wines, and cigars just like they once did.

World's second largest particle accelerator, where nature reveals its secrets.

Largest island in the Baltic Sea experiences such idyllic weather that roses bloom in the middle of December.

Copenhagen's celebrated theme park and gardens.

Beijing's version of Disneyland, completely abandoned, mostly destroyed.