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.

The oldest arboretum on the Dalmatian coast doubles as the gardens of Kings Landing in "Game of Thrones."

Now abandoned, the world's first torpedo factory is crumbling into the sea.

Croatia's "hairy stone" fortress is one of the most well preserved Istrian castles.

Inside this small chapel tucked away in the forest is one of the most well-preserved Danse Macabre frescos.

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

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

Longest fortress system anywhere in Europe.

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

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

This military tunnel dates back to World War II and provides visitors with a little wartime adrenaline.

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

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

Trimmed trees grow alongside the graves like topiary tombstones.

This only museum in the world dedicated solely to mushrooms.

This unique structure allowed boats to bypass underwater mine barriers in the channel to enter the harbor.

Inside this mansion turned museum, the works of prominent Croatian artists are on full display.

Island wonderland for communist autocrats.

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.

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

A peculiar museum that includes many drunken tales, a drunk driving simulator, and much more.

A World War II evacuation tunnel turned into a history display of Croatian state and people.