This 220-year-old house is a reminder of New York City's Dutch past.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

A bit of retro transportation flair preserved in the world's largest department store.

This abandoned subway station can still be seen on regular commuter trips.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

One of only two commuter aerial tramways in the United States.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

A crumbling hospital from the 1850s on Roosevelt Island.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

This family driveway also serves as the highest point in Illinois.

Spanking machines, fake goats, and more devices of humiliation are on display in this museum of fraternal initiation devices.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

A century-old network of freight tunnels underneath the city's historic business district.

Former hotel turned into haunted playground.

What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.

How this Pine Barrens hill got its name is uncertain, but on a good day the view from the fire tower is crystal clear.

The remains of an old sawmill, gristmill and the surrounding industry dating back to the 18th century.