A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This historic timepiece is thought to be the only public clock in the world that keeps lunar time.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Oriental bazaar in the heart of Sarajevo.

A misnamed well, with a deep dark past.

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

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

A pair of connected skyscrapers form this symbolic gateway.

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

This museum preserves the hand-dug tunnel that kept Sarajevo afloat during the Serbian siege.

This historic cemetery was inaccessible for several years due to dozens of land mines.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

The place where World War I began.

Celebrated example of Ottoman architecture that also served as a site for brutal massacres.

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

A Serbian church lit by chandeliers made of weapons.

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

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

Stone age urban planning.

This spaceship-like Serbian monument reaches for the stars in celebration of the fallen fighters of fascism.

A 11-foot former president stands on a Kosovo street that also bears his name.

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

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

Operating continuously since 1903, this "milestone" facility transformed the regional economy.