In this Thursday, August 17, 2017 photo, a herd of llamas runs on a path alongside the Marcapomacocha Lagoon, Peru, in the heights of the Andes where the rain falls for 5 consecutive months. Residents in the city of Lima rely on a vast network of concrete tunnels to transport water originating in lakes within the Andes mountains to the bone-dry capital some 200 kilometers (125 miles) away. (Photo by Martin Mejia/AP Photo)
