A beautiful collection of architectural ornaments rescued from demolished New York City buildings.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

Check out the underground party scene at the "Burning Man of Brooklyn."

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.

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

Volunteer-run library dedicated to exploring five decades of activism history.

An oasis of calm amid the chaos of the boardwalk, the museum traces the heritage of this beloved beachside amusement park.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

“Invented in Key West, Perfected in Brooklyn."

Waterway populated with abandoned projects, including a submarine.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

A collection of human remains, animal body parts, and other macabre curiosities all legally for sale.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

Mexico's astounding mummy museum with "the world's smallest mummy."

Beach instrument turned bed and breakfast.

These azure waters were thought to lead to the Mayan Underworld.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.