The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

The first piece of public art dedicated to LGBT rights.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

Unrepaired walls from a 1920 anarchist bomb attack.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

The oldest living tree in Manhattan comes shrouded in sinister legend.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

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

The "Seinfeld" diner.

A sculpture serving as an homage to Pope John Paul II.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This subterranean shrine beneath a bike rental store celebrates the iconic Italian scooter.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

2300-year-old Roman road connecting the empire.

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