Find out what it sounds like when doves cry at Prince's recording studio estate turned museum.

Once the most densely populated place in the world, this island is now a ghost town.

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

Huge masonic hall in Philadelphia with lavishly themed rooms.

A rare view of a preserved Victorian science museum.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

Contrary to popular belief, this secluded statue doesn't represent Pennsylvania's founder.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

Where America's first doomsday cult awaited the end of the world.

The oldest surviving botanic garden in the United States.

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.

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

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

America's first serial killer rests in anonymity.

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

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 modern ghost town whose inhabitants were driven away by the growth of nuclear power.

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.