The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

A centuries-old forgotten underworld lies beneath Malta.

This only museum in the world dedicated solely to mushrooms.

The only gulag ever to exist in socialist Yugoslavia.

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

A musical instrument played by the sea.

An ethereal glowing blue ocean cave in Croatia.

This remote church calls a tiny island its sanctuary.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

A wellspring of natural Viagra found in Bosnia.

The remains of the last Bosnian fortress to fall to the Ottomans are still standing.

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

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

This brutalist monument is inscribed with 9921 names of Yugoslav partisans who perished during WWII.

The place where World War I began.

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

These warring psychedelic crags commemorate an unsuccessful military operation.

This top-secret nuclear bunker hidden in a Bosnian mountain has been converted to a modern art exhibition space.

An abandoned quarry hides an open-air gallery of huge sculptures, some made from the rubble of 9/11.

The forbidden island of the Tuscan Archipelago may still contain buried treasure.

One of the highest mountain passes in Europe has been ranked among the best driving roads in the world.

This amazingly preserved Doric temple was abandoned before it was ever completed.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

On the coast of Sardinia, a once-great mining village is finding new life as a coastal resort town.