In the heart of Tirana, this underground nuclear bunker has been transformed into a museum.

This feat of Brutalist architecture is also known as the Three Sisters.

A retro Yugoslav congress, cultural, and business hall built in the 1970s, with an iconic world clock.

A museum dedicated to the former country.

Arguably Belgrade's only example of pure Art Deco architecture.

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.

Stone age urban planning.

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

Housed in a 1912 architectural masterpiece, this outlet of the Golden Arches is a real beauty.

This dazzling Art Nouveau mansion is now home to the Modern Art Gallery Subotica.

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

The unusual sculptures are believed to be powerful political symbols.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

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

One of Serbia's oldest luxury hotels and a nostalgic echo to Yugoslavia in the state's former capital.

A pair of connected skyscrapers form this symbolic gateway.

Considered an architectural abomination by some, this metal-clad building is known as 'little red riding hood' by locals.

A small memorial to a deadly night in Serbia that shook the world before it was swept under the rug.

Giant disc-shaped gate took 20 men to close off this city in Madagascar.

Eat the ultimate iteration of Portugal's most beloved pastry.

This ferry carries passengers across the Rhine propelled by no engine or paddles but by the river's current.

These abundant, over-the-top monuments are so widely scattered that they define the entire compact capital cityscape, often leading to jokes about whether there are more statues than residents.

A volcanic crater that visitors can look inside.