The world's largest vertical wind tunnel.

This large midwestern cavern features impressive rock formations and an underground waterfall.

A very classy 1920s-era bar right in Grand Central Station.

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

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

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

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

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

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

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

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

Peek through the gates at this oasis from the city, full of Old English charm.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

An abandoned castle owned and ignored by Masons carries a cursed history.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

New York City's smallest piece of private property.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Try not to get slimed in Tribeca.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.