A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A magical place that lets you play in and explore the world of Studio Ghibli.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A terrific purveyor of natural history objects and curios.

Unrepaired walls from a 1920 anarchist bomb attack.

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

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

A famous songsmith's custom piano, dubbed "High Society," is hidden just out of sight in one of New York's finest hotels.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.