As the aging humans of this Japanese village die off one local artisan is replacing them with eerie homonculi.

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

Closed for decades, this strange symbol of Japan's Expo '70 has finally opened its psychedelic insides to the public.

The self-mummified monks of Japan.

Hanging over one of Japan's "hidden valleys," these vine bridges must be remade every three years.

Experience park where visitors are told to expect the unexpected.

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

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

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

A hospital where antique dolls are given new life.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

A collection of objects supposedly singed by the hands of souls in purgatory.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

The underground sanctuary of a mysterious ancient cult.

Giant stone letters dedicated to the founder of Armenia's alphabet.

Massive, unfinished broadcasting station stands as a monument to the fall of communism.

An unfinished complex built for children from around the world sits abandoned on the Black Sea coastline.

A collection of art from Bulgaria's time as a communist state.

Cave shrine on Monte Pellegrino.

A 1,000-year-old church holds the bones of the Christian martyrs who died hiding inside it.

This entire town moved to a safe location after it was devastated by an earthquake, but the remains of the original town are still around.