The U.S. Navy’s preposterously detailed mini battleship took 77,000 hours to complete.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

This forgotten building was one of the few Philadelphia-area breweries to survive Prohibition.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

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

Final resting place of one of the classic authors of horror literature.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

This 15-foot tall obelisk commemorating the Philadelphia-Baltimore railroad connection sat neglected for over a century.

One of Philadelphia's largest murals resides hidden under this bridge.

A daily replay of the experiment that proved the rotation of the Earth.

The abandoned coal loading dock is a canvas for unsanctioned art.

This elaborate towering structure was once famed for its revolutionary height.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The world’s first penitentiary, meant to be humane, drove men insane.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

This airfield is home to a number of retired vintage planes in various states of disrepair.

From failed port town to Civil War fort, the ruins of this former defense saw their finest day in the television age.

Amazing pre-Civil War ruins alongside a shallow, rocky river that hosts beautiful (but endangered) lilies.