STEVE ALLEN / SCIENCE PHOTO LIBRARY STEVE ALLEN / SCIENCE PHOTO LIBRARY
Machu Picchu, Peru. The Inca city of Machu Picchu sits high in the Andes mountains. The peak at top centre is Huayna Picchu. The city, which was built from around 1460, covers 13 square kilometres and is built in terraces of one-room stone houses (now roofless) arranged around central courtyards and linked by stairways.
Model release not available. Property release not required.