This old cement mine has been used as everything from a mushroom farm to a recording studio.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

One man's swirling six-acre monument of stone.

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

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

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

A once grand hotel is being retaken by the wilderness it once capitalized on.

A natural gas leak provides a flickering flame beneath a waterfall.

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