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

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

This virtually windowless mass of smooth concrete is the only Catholic church in the city.

This symbol of Yugoslav liberation decorated with 620 carved heads of mythical creatures is now a forlorn relic of another time.

Popular river that runs through the remote Serbian municipality of Leskovac.

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

A futuristic, brutalist masterpiece that is also strangely prison-like.

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

This memorial park stands on the site of one of the largest mass executions of the Second World War.

Stone pillars and a petrified wedding party in the hills of North Macedonia.

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