This heart-shaped island looks substantially less lovely after a recent bulldozing project.

An eclectic art form practiced by untrained masters is celebrated at this museum in the heart of Zagreb's old Upper Town.

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

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

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

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

This Croatian island is for sale but no one is buying due to the dozens of accused Nazi sympathizers who were massacred there after WWII.

This abandoned Croatian stronghold never saw a great deal of conflict but it is still a beloved relic nonetheless.

When Croatia became independent of Yugoslavia, the splintering governments left behind these concrete tunnels.

Formerly Yugoslavia's "forbidden island," this sleepy little city still holds the abandoned remains of military strongholds.

This huge metal monument is slowly being stripped to its concrete skeleton.

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

Where the lovelorn find a home for their sentimental keepsakes.

An ethereal glowing blue ocean cave in Croatia.

A full figure 4th century incorruptible saint lies in a glass coffin in Croatia.

Humble beginnings for one of the world's most famous scientists.

A forgotten monument to Yugoslavian freedom.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

The remains of a sunken military ship wreck visible through clear water.

Longest fortress system anywhere in Europe.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

Gargoyle head that brings good luck.

An ancient knight and a symbol of the city's freedom.