The remains of a 19th century spring, and the site of an infamous unsolved murder.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

A cruise terminal that changes the atmosphere of Red Hook's industrial waterfront.

A decommissioned military complex that's now a modern industrial park.

A dilapidated dock tells the story of Titanic's missed arrival.

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

This eclectic sculpture garden in Brooklyn, home to a bizarre collection of art, was once a run-down junkyard.

Behind a grungy bodega facade, a Poblano family serves rich, home-cooked meals.

The only subway station in the city that still makes use of gap fillers.

This innocent-looking townhome is actually a subway exit.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

The saddest little diner in New York.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

Amid skyscrapers and traffic exists this unique aquatic ecosystem.

All of the Malaysian sweets at this shop are made daily with a whole lot of love.

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

Cooks at this tiny takeout spot grind their rice flour in a stone mill each morning for perfect cheung fun.

Slurp sesame noodles at the third-generation family-run establishment that invented them.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

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

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