Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

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

This innocent-looking townhome is actually a subway exit.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

Home on the Hillside, and home of the first breakfast cereal.

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

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.

The home of the first American-born saint is one of the only curved buildings in New York.

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

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

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

This little museum is built on a theater that was once a wildly elaborate speakeasy.

The largest Buddha statue in the Western Hemisphere is just 50 miles north of NYC.

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

A collaborative art project that transformed a neighborhood in NYC's Queens.

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.

Elevated freight railway turned wildly successful urban park.

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

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Tucked in the back of this amazing antique store is an important piece of medical history.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

A crumbling hospital from the 1850s on Roosevelt Island.