A quiet and contemplative oasis in the middle of New York's bustle and riot.

This semi-hidden Manhattan restaurant is based out of a loading dock.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Nikola Tesla's former home contains an homage hidden from plain sight.

One of the last Jazz Age "Wonder Theaters" in New York City.

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

Eighty million natural history specimens call this gargantuan museum home.

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

An enormous steel waterfall is a nod to the substance that shaped Britain's Steel City.

The bizarre headgear looks like it was made for a fool, not a king.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

In its continuing quest to recreate famous parts of the world in miniature, China now has its own ghost Paris.

Hear the quietest sound from across the dome.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

Bridge that died in war and was resurected.

The sad remains of a monument to martial arts legend and movie star Bruce Lee—in the middle of Balkans.

A former bank seized as a sniper vantage point during the Bosnian War is now a secret graffiti art gallery.

Temple complex that once housed the famous statue of Nike.

A musical instrument played by the sea.

Where the lovelorn find a home for their sentimental keepsakes.

This one-time health resort was used by aristocrats around the world.