This spaceship sculpture in the middle of the Slovakian capital looks like it just crash-landed.

The abandoned military base looks like a post-apocalyptic wasteland.

One of the largest barracks of the Austro-Hungarian monarchy's military is now an abandoned ruin.

The remains of an entire Roman city can be explored in this interactive museum.

This Hungarian stilt village is built in a lake that never freezes over due to the power plant that that uses it as a cooling pond.

Budapest's Communist-era statues, banished to the suburbs.

A forgotten graveyard lost in the tangles of an overgrown garden.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

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

Beijing's version of Disneyland, completely abandoned, mostly destroyed.

An eerie, derelict amusement park in Berlin.

A sobering scientific reminder of the human damage caused by the advent of the nuclear age.

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

Founded over a thousand years ago, this shrine is said to be built on the site of a warlord's harem prison.

Largest graveyard in all of Japan surrounds a famous mausoleum.

The largest volcanic caldera in Japan holds an entire city in its maw.

The tallest bronze seated statue of the Buddha in Japan.

Peace Park and the Atomic Bomb Dome.

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

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

One of the first hotel rooms in a pod.

Starship-temple contains 400 tons of drinking water and offers free Japanese lessons.

Twelve hundred stone carvings guard this off-the-beaten-path Buddhist temple.

This mesmerizingly colorful pond looks like a scene straight out of a fairytale.