National Geographic : 1930 Mar
FLYING THE WORLD'S LONGEST AIR-MAIL ROUTE 295 Photograph by Peruvian Naval Air Force, courtesy Capt. H. B. Grow BETWEEN AREQUIPA AND LIMA THE AIR MAIL WINGS OVER MOUNTAIN FASTNESSES Everywhere is rock, save in occasional valleys watered by rivers. A more desolate region than this in the highlands of Peru would be hard to imagine (see text, page 307). © Ewing Galloway VISCAS BRIDGE CROSSES A VALLEY 15,100 FEET ABOVE THE SEA The span is on the Central Railway of Peru, which climbs from Callao, on the Pacific, 140 miles, to Oroya, far up in the Andes, and then turns south to Huancayo. A branch line to the Morococha mines passes over the Continental Divide at an altitude of 15,865 feet, the highest point reached by a standard-gauge track.