The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

Step into a pastel time capsule where candy is truly dandy.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

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

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.