This recipe is set in stone.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

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

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

A crumbling hospital from the 1850s on Roosevelt Island.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

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

This abandoned prison castle has become an imposing gallery of graffiti art.

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

Three acres of mythology-inspired sculptures are visible from the highway.

A decaying garage hidden amid the dense forest is all that remains of a once-prosperous dairy farm.

Originally dubbed "Retirement" by the Navy Commodore who built it in 1780, this beautiful mansion is now the centerpiece of a suburban community park.

A 14-foot monument marks the resting place of two of the town's earliest residents—and one unknown soldier.

The former home of Thomson Francis Mason, the mayor of Alexandria from 1827-1830.

America's first federal monument.

The only place for a truly presidential dram.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

This shale formation along the Appalachian Trail once inspired the third president of the United States.

Time travel with sweets across history at this research-based candy store.

Built in the 1850s, this church was of the first five churches constructed in Harper's Ferry.

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

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

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

These ruins witnessed the final gathering of the failed Jacobite Rebellion.