A semi-scholarly approach to sex.

Try not to get slimed in Tribeca.

New York's oldest magic store.

A terrific purveyor of natural history objects and curios.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

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

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Arlington Cemetery exhibit dedicated to death and grieving.

World's first "penitentiary," meant to be humane, drove men insane.

A rare view of a preserved Victorian science museum.

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.

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

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

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

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

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

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.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

This giant disembodied horse head seems to balance impossibly on its nose.

It would take 35 firetrucks to fill this enormous glacial pothole.

A world-class collection of mechanical musical instruments and automata.

A failed piece of Orientalism has become the proud symbol of a community.

A glittering Thai Buddhist temple in suburban Pennsylvania.