An ancient tunnel in Jerusalem built to redirect water in the event of a siege is one of history’s great architectural innovations.

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

This small and serene place for quiet reflection on Staten Island was built in China based on the gardens of the Ming Dynasty.

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

A crumbling hospital from the 1850s on Roosevelt Island.

Recovered suit of a cannibalistic West African gang.

A Bed-Stuy gymnasium that hosts expansive raves, performances, dance parties, and more.

Lie in a hammock where George Washington stood.

Piano-making empire filled with 200-year-old steam machines still churning out 1,000 instruments a year.

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

Whether you're up or down, the Elevator Museum is worth a stop.

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

Unique antiquarian shop specializing in globes, maps, and prints.

There's a piece of New York City transportation history hidden in plain sight at a Manhattan subway stop.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.