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

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

This translucent sculpture represents a quintessential component of New York City's skyline.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

A garment factory hides a small Dominican eatery in the hallway to its freight elevator.

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

A bit of retro transportation flair preserved in the world's largest department store.

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.

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

A retro walk through the history of the tube.

The remains of a ruined mansion memorialize the 1906 earthquake.

The lynching and burial site of America's first train robbers.

The rustic cabin-like decor of this Arts and Crafts-style church reflects the love of nature central to its little-known theology.

America's oldest Italian restaurant is a San Francisco institution.