This black sand beach was crafted from volcanic explosions including the historic Minoan eruption.

An intricate network of underground tombs carved into volcanic rock.

A small Portuguese cottage formed between boulders in the countryside.

A unique seaside cave where Aleister Crowley faked his own death.

A submerged village appears when dam levels drop.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

The romantic garden was the epicenter of the Hungarian art scene in the 1880s.

A museum in the childhood house of a medical pioneer.

After a catastrophic forest fire, a Greek artist transformed scorched tree trunks outside an old sanatorium into this haunting sculpture garden.

This quaint farm in the Peloponnese countryside hides an astonishing cache of antique curiosities.

A magical, if a bit tacky, 1960s castle conjures up medieval fairytales and Greek mythology.

Overlooking the harbor is a beautiful neglected mansion guarded by two Egyptian sphinxes.

Seventeen oak trees sprout from the roof and walls of this tiny chapel without any visual evidence of roots.

Poseidon? No one seems to know.

An alien landscape on the banks of the Aegean Sea.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.

This bone-filled cave got its name after they found 140 bear skeletons inside.

A muddy alien landscape that is home to rare species of exotic plants.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

This massive underground salt mine now holds a sci-fi theme park in its depths.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

Large miniature theme park with 100-plus models.