Underneath the bustling city streets, a hydroponic farm grows unique herbs in an urban oasis.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

A one-ton statue of Steve Rogers beautifies the entry to a Brooklyn Bed, Bath & Beyond.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

Some of New York's best tacos can be found in the back of an unassuming bodega in Queens.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

Love is in the air along the small street in Brooklyn.

Before online banking and smartphone apps, there was "commuter banking" in the subway in Downtown Brooklyn.

Jimi Hendrix's legendary recording studio in Greenwich Village.

No monkeying around, this fountain was really named after the classic sci-fi film.

Stunningly detailed mosaics in a New York subway station bring life to the Weimaraners of artist William Wegman's work—and to thousands of commutes.

Hidden behind a gate in Greenwich Village is a little farmhouse that once served as the writing studio of a bestselling author.

The site of a fallen tree that protected Americans from British forces during the American Revolution.

This elaborate tunnel is the first structure composed of cast concrete in the United States.

This outdoor gallery of sculptures along the East River was once a landfill.

This striking arch, one of the first architectural elements constructed in Prospect Park, was recently restored to its original glory.

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

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

Believed to be the oldest active college baseball field in America.

The remains of a foundry and old blast furnaces destroyed during the Civil War are preserved in this central Alabama park.

Once a bustling cotton factory, this early 20th-century building is now home to a thriving artspace.

A unique book shop with a collection of rare tomes and a nostalgia museum.

This architectural triumph is the only Frank Lloyd Wright house in Alabama.

148 feet long and in the middle of a verdant forest.