Norway's national monument to fallen seamen.

Tens of thousands of tiny bottles stuffed with various items.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A visionary Italian architect created an impressive cluster of concrete structures for a family's private tomb.

A science fiction-inspired apartment building designed by a famous Spanish architect.

One of the largest collections of socialist realist art shows the surprising depth of the official art of the Soviet Union.

An eerie maze of industrial factories looks like something out of a dystopian sci-fi.

This historic hydroelectric power plant in Japan has been preserved and is open to the public.

A small island with no monkeys but plenty of military ruins.

Thirty architectural gems from the 19th- and early 20th-century Tokyo were restored and relocated to this space.

A strange tribute to all the fallen souls of war.

Elaborate series of tunnels where traces of mass suicide are still visible.

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

A Japanese corporation has turned this small island town into living modern art gallery.

Abandoned Japanese ghost town gives a glimpse into what our own metropolises may leave behind.

One of the first hotel rooms in a pod.

A massive cave complex boasts some of the clearest water (and most charming bats) in the world.

The world's largest drain sits below the city of Kasukabe, Japan.

Japanese company creates clone dolls that reside in the "uncanny valley."

The self-mummified monks of Japan.

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

Japan's corrupt-mental-institution themed restaurant offers diners a chance to eat inside of filthy cells.

A 70-foot-deep ice cave formed by lava from Mt. Fuji on the edge of Japan's "Suicide Forest."