A terrific purveyor of natural history objects and curios.

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

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

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

This 150 foot seven-tiered cascading waterfall is one of the hidden gems of the White Mountains.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

A beautiful, creepy 19th-century castle stands incongruous in rural Vermont.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Cryptic messages embedded in the New York City sidewalk.

A whimsical, but often overlooked clock in Park Avenue.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

New York's oldest magic store.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

Need to book a room at the Hotel Pennsylvania? Just dial up 6-5000.

An unassuming secret door once led to a legendary watering hole.

This semi-hidden Manhattan restaurant is based out of a loading dock.

Cheap pizza and all of your naughty bedroom needs housed in a stunning example of Art Nouveau architecture.

There must be a pun in this haystack somewhere...

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

Captain America, Sub-Mariner, and the Human Torch were all born in this art deco Manhattan masterpiece.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

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

Amid the marketing blitz of modern Times Square is an elegant holdover from its showbiz glory days.