Once a black market electronics marketplace, now an otaku shopper's paradise.

This Buddhist temple is home to the graves of the Japanese national legends, the 47 Ronin.

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.”

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

Once the most densely populated place in the world, this island is now a ghost town.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

This 700-year-old street food market features baby octopus and soy donuts.

Tokyo’s only Vaudeville-cuckoo clock–steampunk-Victorian curio cabinet time piece.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The middle finger of modernity.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The quintessential Japanese rock garden has existed for more than 500 years.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

A Nesting Doll of Churches.

The bomb-ravaged remains of of a colossal Neptune.

Cold war icon and onetime "hole" in the iron curtain.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

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

The burial grounds of a Chinese eunuch who served his way into the highest levels of Imperial government.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Four alabaster giants contemplate the tides on the shore of Denmark.

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.