Once the world's largest reinforced concrete structure, this abandoned bridge now beckons urban explorers.

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

A 19th century hat factory still stands as a crumbling ruin in upstate New York.

A former connection to City Island, it has been abandoned since the 1930s.

A forgotten relic from New York's bygone trolley system hides in plain sight under a bridge.

This once sprawling resort now sits abandoned, filled with graffiti and vibrant colors from an era long passed.