Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

This abandoned Slovenian military barracks has become a punky-political art squat.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

This former estate of a fascist leader is now a burnt out ruin leading to a system of secret tunnels.

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Where the lovelorn find a home for their sentimental keepsakes.

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

Some of the best-preserved specimens of the monumental medieval tombstones found throughout Bosnia and Herzegovina.

The first mosque in the world to receive electricity.

This enormous abstract sculpture is part jungle gym, part elaborate noise-making machine.

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

Place with alleged mystical powers in Old Orthodox Church in Sarajevo.

This ironic war memorial thumbs its nose at a campaign of inedible humanitarian aid food products.

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

A war-torn Olympic relic is being overtaken by graffiti and nature.

The haunting ruins of a military fortress turned astronomical observatory sit on a Sarajevo mountaintop.

Gargoyle head that brings good luck.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

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

Bronzes and busts that once stood in the city's main squares are now relegated to a small hidden courtyard.

What happens when you cross a mayor and a painter?