This museum showcases the art of ancient sword-making.

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

One of the last full-orchestra recording studios in New York City and an acoustical marvel.

Plot your trip through the city on the sidewalk.

Elevated freight railway turned wildly successful urban park.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

This former Norwegian sailor's church is slowly being taken over by ramshackle robot musicians.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

Sniff the Titan Arum's rotting flesh.

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

A hip bar decorated with walls of golden skulls.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

This sacred cave temple is home to thousands of bats and according to legend, a giant snake king.

Rotterdammers' dirty minds gave this santa a dirty nickname and cursed it to a life of wandering.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

A true Valhalla for cactus and succulent lovers.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

The world's only museum devoted to the wonders of fluorescence.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

A beautifully eclectic mix of architectural styles.