Hear the quietest sound from across the dome.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Commemorating the spot where the famous scientist fed his pigeons.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Where commuters walk through remnants of an ancient Greek necropolis.

Elaborate tile work in this railway station tells the story of Portugal.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

A man's home is his castle.

This abstract roadside poultry was saved from demolition by outraged drivers and pilots.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

Civil War soldiers, captains of industry, and paupers all interred on historic grounds.

Cold war icon and onetime "hole" in the iron curtain.

Macabre astrological automaton clock dating to the late 1400s.

Try not to get slimed in Tribeca.

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

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

A whimsical bridge adorned with decorative dragons.