This army of concretions is an unexplained geological phenomenon unlike anything else in the world.

A snowy highland notorious for unexplained aircraft crashes is France's own Bermuda Triangle.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

German and American troops joined forces to defend this fortress during the strangest battle of World War II.

France's high-tech, future-themed amusement park.

This is what trains will look like after the zombie apocalypse.

One of the foremost Sherlock Holmes collections is hidden away at a Toronto library.

A unique collection of Science Fiction, Fantasy, and everything in-between.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

Willy Wonka would love this weird half-a-home.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

These expertly crafted, scientifically accurate glass sea creatures were once an international phenomenon.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

A near tragic event on this bridge helped inspire the classic film "It's a Wonderful Life."

The little-known final resting place of one of America's greatest writers.

World's largest herd of white deer populate a former U.S. Army depot.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

A field in which God and his son Jesus purportedly appeared to a young farm boy named Joseph Smith.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

An old dining hall now serves up ghost stories for lusty locals.

Eclectic architecture in the woods of New York.

The Fox Sisters, America's leading mediums in the mid-19th century, possessed a table they claimed helped them "communicate" with the dead.

A room hidden behind a swinging shelf in the children's section.