Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

A public work of art that also provides some relief from the summer heat.

A whimsical bridge adorned with decorative dragons.

This one-time health resort was used by aristocrats around the world.

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

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

The walls of this medieval church are covered with perfectly preserved frescos, including a pristine example of the Dance of Death.

Through the colossal entrance to this cave you'll find limestone tubs and an underground waterfall.

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

This beautiful medieval Serbian monastery is home to frescoes, peculiar sculptures, and historical curiosities.

The bizarre rocks of Đavolja Varoš are the result of natural erosion.

Structure built from the skulls of vanquished foes.

Serbia's master of striking memorials erected a forgotten, hidden gem in the hills outside a tiny village.

This 15th-century Serbian Orthodox monastery also contained a school for illuminating manuscripts.

A hidden stream deep in the mountains creates one of the largest tufa waterfalls in Serbia.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

Near Belgrade, an ancient-looking sarcophagus serves as a World War I monument.

Backwards hour and minute hands and a timing mechanism that fluctuates with the temperature led to this clock tower's local nickname.

The place where World War I began.

Oriental bazaar in the heart of Sarajevo.

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 ironic war memorial thumbs its nose at a campaign of inedible humanitarian aid food products.

A war-torn Olympic relic is being overtaken by graffiti and nature.

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