1 Puente Nuevo, Ronda, Spain : The Puente Nuevo or “new bridge” is not that new: it was built during the years 1751-1793 and iIt crosses the Guadalevín river in the 120 meters (390 ft) deep El Tajo gorge. The long construction claimed the life of 50 workers. The bridge includes a small chamber under the central arch that during the years was used for different purposes including a prison, and during the civil war of the 20th century the chamber was used for torture and prisoners were even thrown to their deaths. Despite the grim history, it’s hard to ignore the beauty of this bridge that is carved into the two sides of the gorge