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

Where the lovelorn find a home for their sentimental keepsakes.

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

This 135-year-old weather station studied the effects of the climate on human health.

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

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

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

A unique two-level bridge designed to honor a king.

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

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

Built as an anti-fascist tribute, this surreal Yugoslav memorial became an unwelcome symbol after the Croatian war for independence.

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

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

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

A tower marking the spot where Yugoslavia began its resistance against the invading Nazis stands neglected, but not quite forgotten.

A relic of the Cold War tucked away in the forested hills above Bratislava.

A shrine-like museum entirely dedicated to soccer superstar Cristiano Ronaldo.

A 1970s resort city now stands abandoned, caught in the middle of a divided island.

This tower is all that remains of the mosque that once stood in the center of the city, before it was destroyed by fire in 1941.

Monasteries on rock pillars, once accessible only by frayed ropes.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

There are thousands of tributes and memorials to the King, but none quite like this one in a Kraków city park.

Poland's oldest salt mine has nearly everything one needs to live underground forever.