Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

The eccentric mansion of one the most popular horror authors of modern times.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

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

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

A wall of chewing gum moonlights as collective art.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

The only rotating bar in New Orleans has been slowly spinning since 1949.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

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

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

Quite simply the largest tree in the world (by volume).

The magic's in the hole!

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Tiki luxury on Nob Hill.

Ride the subways of yesteryear.

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

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

A beautiful geyser under environmental threat.

New York City's smallest piece of private property.