New York's unstoppable progress turned this cemetery into the smallest burial ground in the city.

A Manhattan Episcopal church with an eerie underground crypt.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

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

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

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

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

Detailed facade of a brownstone in Boerum Hill.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

The first and only carousel with a lineup entirely of insects.

Final resting place of Typhoid Mary.

A golden egg-shaped sauna in the Arctic tundra.

Something's watching you.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.

One of the oldest churches in Romania is believed to have been built on the site of a pagan temple.

The romantic botanic tunnel feels like a well-kept secret.

The most alien-looking place on Earth.

This mesmerizingly colorful pond looks like a scene straight out of a fairytale.

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

A crumbling hospital from the 1850s on Roosevelt Island.

A decommissioned military complex that's now a modern industrial park.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.