A remnant from the golden age of aviation still in use today, Pan Am's Clipper service took off from this Art Deco gem.

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

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

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

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

On this island, you suck away your garbage via an elaborate pneumatic tube system.

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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The factory for the popular Dumbo location, the Greenpoint shop is a quiet gem.

Elevated freight railway turned wildly successful urban park.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

A decommissioned military complex that's now a modern industrial park.

New York City's smallest piece of private property.

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.

Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

Romania's triumphal arch looks out over Bucharest.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The celebrated eyesore created by starry-eyed sweethearts.

This bridge was constructed from the rubble of the infamous Bastille.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Giant, friendly pelicans in Central London, the most unlikely of places.