Discovered by cows, these upstate New York show caves are presented with a healthy dose of psychedelic folk art.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

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

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

A restaurant on Staten Island showcases a different grandmother’s cooking every night.

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

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Sniff the Titan Arum's rotting flesh.

The "Seinfeld" diner.

Ride the subways of yesteryear.

New York City's smallest piece of private property.

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

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

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 crumbling hospital from the 1850s on Roosevelt Island.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

As state high-points-by-elevation go this spot is one of the lowest, but for years it was also the hardest to climb.

From horses to stainless-steel trucks, this iconic Providence burger wagon is one of the oldest mobile diners in the country.

This abandoned factory on the Hudson River once churned out a million bricks a week.

A 19th century hat factory still stands as a crumbling ruin in upstate New York.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

It looks like a whale, it's part of Yale, and it's best-known by a nickname you can probably work out for yourself.

The schoolhouse where Jesse Merwin, the inspiration for the "The Legend of Sleepy Hollow" character, once taught.