This narrow fjord-like bay is the largest ria in the Mediterranean Sea.

Just a few miles from Novalja, a strange geological oddity has left scientists baffled.

The only gulag ever to exist in socialist Yugoslavia.

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

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

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

Yugoslavia's biggest underground airport lies in ruins.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

Where the lovelorn find a home for their sentimental keepsakes.

An ethereal glowing blue ocean cave in Croatia.

Sculpture designed by Turkish artist and professor Mehmet Ali Uysal.

Legend has it fairies gathered at the site of this medieval castle.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

The "dragon babies" of southeastern Europe.

A miniature train-ride through Slovenia's largest cave system.

This massive subterranean fissure is known as the "underground Grand Canyon."

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