This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

A remote horde of architectural treasures fit for Indiana Jones.

The oldest surviving botanic garden in the United States.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

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

America's first serial killer rests in anonymity.

Arlington Cemetery exhibit dedicated to death and grieving.

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.

A diorama of the Civil War, fought by cats.

This recreation of a 19th-century dime museum is full of oddities.

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.

This stately 19th century library pushed architectural boundaries at a time when the public library movement was just taking off.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

Hundreds of antiquated typewriters and office machinery show the technological evolution of business.

Delicate Wurlitzers, creepy clowns, and The Noid all share space in this insane explosion of kitsch history.

In which a local geological marvel becomes a quaint roadside attraction.

A drab two-story office space in Delaware is a hidden tax haven for Hillary Clinton, Donald Trump, and over half the Fortune 500 companies.

A local prank turned town icon.

This historic old movie house was the scene of one of the Blob's most iconic attacks.

Pennsylvanian mass grave and possibly mass murder.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.