Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Imperial palace of Emperor Galerius, the Emperor behind the worst Christian persecutions during the Roman Empire.

Cold war icon and onetime "hole" in the iron curtain.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

The last bastion of Roman presence north of the Alps looms over a German town.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

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

Structure built from the skulls of vanquished foes.