One of the largest festivals of flowers in North America takes place, appropriately, in the Flower City.

During the holidays, a vintage subway train whisks New Yorkers back in time.

The "Seinfeld" diner.

Lie in a hammock where George Washington stood.

The most confusing clock in New York.

Elevated freight railway turned wildly successful urban park.

Constructed in the 1920s, this former pencil factory is now an office building.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

The 28-foot granite map plots the locations of 40 theaters in New York City.

The highest point on the island known for buildings that touch the sky.

Little Red Lighthouse under the George Washington Bridge.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

The legendary court where emerging basketball players gain their street cred.

A Manhattan Episcopal church with an eerie underground crypt.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

Two dozen rescued bears roam (mostly) free at the largest bear ranch in the U.S.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

A sculptural commentary on capitalism pokes up from the East River.

Site of the first pathological and bacteriological research facility in the United States.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

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