A galley-shaped memorial to the prisoners of an infamous fortress.

Seven centuries ago, its holy door opened for a forgiveness procession ritual that was later "copied" by the formal Catholic Jubilee.

What looks like a link in Gondor's early warning system is actually a centuries-old Italian fortress.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

A 16th-century horror show built in a lovely Italian garden.

Water and windows define this defensive Italian well.

Romans built the world's tallest artificial waterfall in 271 BC.

A map of Italy made entirely of trees.

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

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

This ice cream parlor serves scoops of flavors like rakia, medlar, and poppy seed.

The unusual sculptures are believed to be powerful political symbols.

This striking, historic hotel has major Wes Anderson movie energy.

A Serbian church lit by chandeliers made of weapons.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

A pair of connected skyscrapers form this symbolic gateway.

Two buildings named after their windows that make it look like a sea of television sets plastered to a wall.

This statue of the famed author, actor, and journalist is made entirely of screw-nuts.

The ruins of a military-industrial complex now host concerts and more.

Four monuments dedicated to the legendary band in Serbia.

This statue honors the first Relay of Youth.

Abstract monuments express sorrow and resilience at the site of a horrific massacre in Nazi-occupied Serbia.

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.

An old slaughterhouse now holds the largest collection of pig artifacts.