With the Wild Bunch hunted almost to extinction and the law closing in on him, Butch Cassidy fled to this remote cabin in Argentina.

This multi-level, aqueduct-footbridge hybrid is one of the greatest works of the Spanish Renaissance.

An enchanting landscape of ancient sandstone structures eroded into otherworldly shapes.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

The oldest Roman lighthouse still in use.

This overlooked museum houses an amazing collection of rare, antique typewriters.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

This underwater graveyard commemorates a group of murdered 16th-century missionaries.

This "flat geyser" bubbles up out of the ground periodically like a disappearing river.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.