As New Yorkers go about their daily business, few realize that a whole other world lies just beneath their feet. Deep underdeath New York City is a mysterious world of pipes and passageways. From abandoned train stations to water valves the size of a city bus, discover Gotham's buried treaures.

With 714 miles of track along 244 miles of routes, 8 million people push through 3,000 subway turnstiles every day. Join host Kelly Choi on a journey through New York's subterranean transportation system and unearth some of its most hidden secrets.

Ever since the first settlers arrived in New York harbor, the physical environment has undergone many facelifts. Join host Kelly Choi as she reveals New York's hidden lakes, underground rivers and forgotten mountains.

From stacks of gold to rare artifacts locked away in vaults, New York City is an enormous repository of hidden trasures. Watch as host Kelly Choi reveals the most valuable items in New York City.

Bridges connect New York City and are a testament to the determination and will power of their builders. Join host Kelly Choi on her mission to find out which bridge can hold the heaviest load and what secrets lay behind their ingenious construction.

As a neighborhood, TriBeCa has evolved and re-defined itself many times throughout the centuries. Today, its iconic buildings and cobblestone streets serve as backdrops for some of Hollywood's biggest features. And its annual film festival draws thousands of filmgoers from around the world. TriBeCa has truly emerged as one of New York's City's premier neighborhoods. Join host Kelly Choi as she travels back in time to discover the mysteries and intrigues that helped shape the Triangle Below Canal Street and have made it the center of Gotham's film industry.

Kelly Choi explores the South Street Seaport and climbs aboard the tall ships that made New York an international trade center. We see the city’s earliest hotel rooms, meet sea pirates like Captain Kidd who made Manhattan their home, and search for ghosts in the oldest tavern in New York City.