Holding the most bodies of any cemetery in the United States.

A Manhattan Episcopal church with an eerie underground crypt.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

A hidden "place of interment for gentlemen."

Unique antiquarian shop specializing in globes, maps, and prints.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

Lie in a hammock where George Washington stood.

More gold than anywhere else, ever.

In the early 1800s, surgery was also a show.

An incredibly well-preserved piece of ninth-century Viking poop.

This ruined 15th-century hermitage is steeped in myth and mystery.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

Hidden on two floors of downtown building, the library has an incredible deal on rent.

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

This Roman amphitheater is said to be King Arthur's legendary Round Table.

When it came to designing his own small office building, the eccentric architect wasn't afraid to show the world what he could do.

A magnificent mansion hides a delightful collection of historic timepieces.

A spooky juxtaposition of caves and graves gives this legend-filled cemetery a particularly haunting vibe.

An enigmatic natural rock formation with a manmade passage cut through the center.

This lonely metal cross may hint at the true location of a medieval showdown between Christian and Pagan kingdoms.

This Victorian marvel of engineering and artistic prowess is nicknamed the "Cathedral of Steam."

The ancestral home of beloved English poet Lord Byron has a bizarre history.

This romantic, decaying 13th-century ruin on the edge of Sherwood Forest is reputedly one of England's most haunted places.

These bleak 800-year-old ruins were once the royal residence of choice for hunting in Sherwood Forest.