Depending on the region's rainfall, this church may be partially submerged.

This 3,800-year-old site contains markers used to study the movement of the sun and moon and create a lunar calendar.

An unmistakable facial pareidolia in the Julian Alps also includes a fantastic tale.

A crumbling World War I fort that is reached through a series of concrete tunnels.

A miniature train-ride through Slovenia's largest cave system.

This massive subterranean fissure is known as the "underground Grand Canyon."

This one-time health resort was used by aristocrats around the world.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

Slovenia's first mosque is a striking mix of Islamic and modernist architecture.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

This abandoned Slovenian military barracks has become a punky-political art squat.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

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

A grotesque collection of wax limbs depicting the symptoms of venereal disease.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

"Unity, Creativity, Beauty."

A mosaic monument that commemorates the historical struggles of the people of North Macedonia.

This elegant monument to those who fought against fascism is inspired by the shape of the poppy flower.

Space-age monument to an early 20th-century uprising.

A little-known park with unusual, half-ruined structures and a mystical energy.

Different sections of the Zemun Fortress were built in the 14th and 15th century as a response to the advance of the Ottoman Empire.