Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

Handsomely crafted representations of our round planet.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

This mysterious and once-grand memorial still embodies a remarkable architectural vision.

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

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.