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

Religious perseverance and cultural coexistence manifest in an architectural gem that multiple wars couldn't topple.

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

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

An abandoned resort in North Macedonia is a relic from the Communist Party of Yugoslavia.

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.

This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Giant marble phalluses on the sacred island of antiquity.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

Perched on a spindly rock spire in a Greek archipelago, this lighthouse would make a perfect wizard's tower.

A spectacular cave and a beguiling lake.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

Monasteries on rock pillars, once accessible only by frayed ropes.

The cave holds a spectacular array of stalactites and stalagmites, including one shaped like a giant human heart.

A museum glorifying the life of Stalin, located in the city of his birth.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

These Stalin-era industrial 'death traps' hang lifeless above the city

Underground monastery and fortress.

The charmingly disheveled clock tower of Tbilisi's puppet theater.