Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Two stunning 17th-century libraries and a cabinet of curiosities.

Macabre astrological automaton clock dating to the late 1400s.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.

South Korea's largely symbolic, barely used gateway to the North.

Home to more than 13,000 pieces of war memorabilia and military equipment.

South Korea's women of the sea have completely flipped their society's structure by becoming revered fisherwomen.

South Korea's only sex-themed park.

Secret North Korean passage discovered below the world's most dangerous border.

Rows of stone statues are dressed up to mourn children that are lost before birth.

After being lost for decades, this striking mural depicting the atomic bomb covers the wall of a busy Tokyo metro station.

This little replica of Lady Liberty provides a bit of NYC in a Japanese city.

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.

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

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

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

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

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

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

The secret medieval communication system will whisk your words above the noise of the crowd.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

A space dedicated to contemporary art and culture, co-chaired by fashion icon Miuccia Prada.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.