Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

This tower is all that remains from a medieval fortress.

This former monastery is still a revered religious site.

It may seem a little out of place in a tiny village, but the inspiring story of its creation made headlines.

The first European statue dedicated to the legendary musician.

Ruins of an old water tower that look like a horror-film castle.

Once a beautiful palace, this structure is now known as the ''museum of destruction."

A hidden stream deep in the mountains creates one of the largest tufa waterfalls in Serbia.

This natural monument has an origin story steeped in legend.

These natural stone bridges are the largest on the European continent.

Stone age urban planning.

Through the colossal entrance to this cave you'll find limestone tubs and an underground waterfall.

A beautiful 19th-century mansion slowly crumbled and became a 'ghost house' after World War II.

The ridged layers that make up this river canyon represent Earth's geological history.

Curious carved stones and bird-like wings are a symbol of Serbian resilience and freedom on the site of a WWII massacre.

An abandoned monument remembering the "Pančevo Holocaust" now stands as a shadow of its former self.

This fresco-covered medieval monastery hangs from the side of a steep cliff.

This mesmerizing medieval monastery-cave complex sits thousands of feet above ground overlooking a valley.

Serbia's master of striking memorials erected a forgotten, hidden gem in the hills outside a tiny village.

Despite being pillaged and destroyed a number over times down the centuries, this historic church still sort of stands.

The ruins of this medieval castle on a foggy hill tell the story of a once-mighty empire.

The bizarre rocks of Đavolja Varoš are the result of natural erosion.

Legends of treasure and spirits flow from this this fairy tale-like oasis.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.