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

This iconic tattoo shop has its own onsite museum with artifacts from the early history of modern body art.

Wine bottle sculpture with a ship's stateroom inside.

“Invented in Key West, Perfected in Brooklyn."

This enormous Hindu temple in Queens serves incredible dosas in its basement canteen.

Slyly buy a shake in the Parker Meridien lobby.

Abandoned power station once home to a squatter community, now being developed into an arts center.

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

The oldest surviving synagogue in New York City is now a soaring art space.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

More gold than anywhere else, ever.

Sniff the Titan Arum's rotting flesh.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

A hip bar decorated with walls of golden skulls.

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

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Elevated freight railway turned wildly successful urban park.

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

Walk into the 19th century without leaving Brooklyn.

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The train platform where Jews were sent to concentration camps is now preserved as a Holocaust memorial.

Vast network of air raid tunnels beneath Lombardy's capital.