This subterranean spot might be the epitome of Japan's baroque, retro coffee houses.

The mouldering remains of a disgraced British children's icon are hidden in the brush of a public park.

This medieval manor house was equipped with secret compartments for hiding priests.

A little slice of Japan and its aesthetics in London's Holland Park.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

A subterranean playground in an abandoned slate mine.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This faux-seedy Japanese arcade is made up to look like a maze of alleys straight out of a cyberpunk dystopia.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

Disaster prevention apartment blocks in Sumida Ward are designed to save as many as possible in the face of the inevitable.

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

After a profound show of devotion for his master, a dog becomes the symbol of loyalty for an entire nation.

A 20-meter (65-foot) robot towers over Tokyo Bay.

Not quite the menace it once was, this monster still has some chops.

The original "capsule building" is a masterpiece of Metabolist architecture.

A Japanese concept restaurant that feels like a party thrown by the monsters in your closet.

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

If Hello Kitty were Mickey Mouse, this would be Disneyland.

Cabaret where the show girls are all androids, and the patrons couldn't be more pleased.

A magical place that lets you play in and explore the world of Studio Ghibli.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.