You can still ride this 100-year-old work of art in Brooklyn's largest public park.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

Once America's longest-manned military fort, now an abandoned hulk.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Mysterious 500-year-old tapestries depict a unicorn hunt.

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

Sniff the Titan Arum's rotting flesh.

Elevated freight railway turned wildly successful urban park.

A crumbling hospital from the 1850s on Roosevelt Island.

This graceful little figure is a one-of-a-kind version of the cherished character.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

A mysterious air force base built to resemble a Long Island fishing village.

It was once the base for a series of domestic terror attacks.

Climb inside an iron crystal magnified 165 billion times its normal size.

Europe's official "zero-level," the equator of elevation.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

An enormous, inside-out glass globe built in 1935.