Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

The world's longest known cave system.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

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

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

This tiny New Jersey village has lived many lives but seems determined to remain a ghost town.

This ominously named New Jersey street seems to be attracting over-the-top legends of its own making.

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

America's smallest town is run by its single citizen/mayor/librarian/bartender.

This erect, phallic geological spire wasn't always named so domestically.

One man is on a singular quest to name an island after a famous hip-hop artist.

On top of Gibbet Hill lie the ruins of a lavish turn-of-the-century estate that never quite came to be.

It's not a typo, now say it five times fast!

The land is home to swimming ponies and a legendary 18th-century treasure.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

The highest point in Washington state is a volcano covered in glaciers.

Roaming bison and a spectacular view at the highest point in Nebraska.

The abandoned ruins of a beautiful medieval castle just outside Barcelona.

This sprawling bookstore spans four floors and has more than a million books in stock.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

A warning to the weak-kneed: This narrow bridge does its swinging eight stories high.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

This small-town Connecticut restaurant gives each diner a free book from its vast library.