The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

This small piece of railroad history sits behind the parking lot of a chain grocery store.

A historic grist mill and active sluice on the Black River.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

The loneliest island in New York.

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

Nondescript building owned by ExxonMobil working on siphoning Greenpoint Oil Spill out of the ground.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

Hunt for buried treasure in Nova Scotia.

Series of storm drains connected to a dark urban legend.