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

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

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

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

This Bronx apartment building is officially recognized as the birthplace of hip-hop.

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

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

Retribution for death of infamous mob boss Franie Yale was a case of mistaken identity.

Two monstrous warehouses. One now holds priceless works of art, the other stands abandoned and dilapidated.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

Once America's longest-manned military fort, now an abandoned hulk.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

A crumbling hospital from the 1850s on Roosevelt Island.

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