This 16th-century monastery has been turned into a surrealist architecture compound.

Five candy-colored villages on the Italian Riviera.

An Italian hillside ghost town.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

Geothermal waterfalls in Tuscany.

Stalactites and stalagmites in a beautifully lit cave.

Renaissance villa and gardens complete with a tormented colossus.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Architectureal fantasy quarter of Rome.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

A 16th-century horror show built in a lovely Italian garden.

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

Approximately 300 million years ago, a massive coral reef existed in what is now the largest limestone cave in Japan.

A bibliophile's heaven that contains hundreds of bookstores, offering over a third of secondhand books for sale in Tokyo.

Modern Japanese museum is buried by snow annually.

A mysterious set of tunnels carved in the hills of rural northern Kyushu.

One of the world's largest tanks mimics the experience of watching rare whale sharks, giant rays, and deep sea creatures from the ocean floor.

Enormous underground chamber built to detect 'ghost particles' of the universe.

Unusual hexagonal rocks formed by cooling lava named for their resemblance to traditional Japanese tatami mats.

A Japanese cat island also populated by the descendants of a band of banished samurai.

This pond is so stunning it looks like you've stepped into one of Monet's masterpieces.

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

Nine Gardens in one—with tea service.