A Manhattan office building is home to the world's largest chess board.

Salute the leader of the proletariat.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

New York's oldest and possibly grandest keeper of books.

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

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

Bowl in splendor, if you're lucky.

This abandoned subway station can still be seen on regular commuter trips.

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

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

From scholastic to sepulchral - now under reconstruction.

One of the last Jazz Age "Wonder Theaters" in New York City.

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

One of only two commuter aerial tramways in the United States.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

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

Elevated freight railway turned wildly successful urban park.

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

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

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