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

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

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

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

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

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

The now-overgrown beach resort was once frequented by Yugoslav military elite.

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

Gargoyle head that brings good luck.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

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

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

A musical instrument played by the sea.

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

Urban explorers embraced America's now demolished first suburban mall, south of Chicago.

Despite its name, this fast food museum is actually a replica of the ninth McDonald's store.

A onetime gangsters' hideaway where you can dine on steaks, fine wines, and cigars just like they once did.

An abandoned meat mecca now serves as an excellent locale for urban exploration.

A European-style bath house in Chicago.

What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.

The oldest house in Galena, Illinois, now is a reminder of when this city was the world's lead mining capital.

The sign to a demolished amusement park now stands in front of a local library.

Tucked away amongst townhomes lies a restored, early 20th-century tea house and garden, the only remains of a historic estate.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.