This retro underwater observation tower would make the perfect lair for a sea-loving villain.

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

This park boasts a unusual collection of curious monuments from around the world, from Micronesia to Antarctica.

The longest living non-clonal organisms on Earth.

The first miniatures museum in Asia contains all sorts of itsy-bitsy wonders, including the world's smallest working television.

The spectacular and eerie moss-covered grave site of 19th-century Belgian merchant.

Jurassic Park in South Africa.

A hidden gallery exhibits intricate, decades-old Buddhist reliefs.

Abandoned station along an ancient pilgrimage route.

In the heart of Luxembourg's "little Switzerland" weaves a breathtaking natural sandstone canyon with a mythological past.

A miniature beach in the middle of the desert.

Colorado's only active volcano last erupted around 4,000 years ago.

Visit an imposing 13th-century Transylvanian citadel lurking not far from the region's more heavily touristed attractions.

The long-lost final resting place of an accused witch.

A German artist built a home and garden filled with whimsical art pieces, like a massive, operational volcano.

This ”skyspace,” which bears a resemblance to a spacecraft, is designed to disappear in the presence of light.

A 30-mile-long glacially-carved canyon leads to a massive pair of glaciers.

Guarding the city of Chiyoda is a bizarre insectile creature with a name no one can pronounce.

This atmospheric ruins are truly a sight to behold.

Mosques carved from coral and dozens of well-preserved stone structures fill this 500-year-old Swahili trading center.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

This small Japanese street is lined with figures, sculptures and a shrine dedicated to frogs.

On a corner of the Ardmeanach peninsula on the Isle of Mull, a 50 million-year-old fossil tree hides in the coastal cliffs.

Nicknamed the "Spirit of Paul Klee," this colorful apartment building features an array of multicolored panels.