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

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

This beautiful Croatian fortress is haunted by legends of forbidden love.

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

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

A whimsical bridge adorned with decorative dragons.

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

A musical instrument played by the sea.

This Croatian computer club features such gaming relics as the infamous Virtual Boy and an 8-bit Pacman machine.

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

This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

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