This is the story of the amazing Incas and the building of their "City in the Clouds: Machu Picchu". The city is as astonishing as were its builders. Set between two mountain peaks in a remote, inaccessible area of the high Andes, this breathtaking city was never found by the Spanish Conquistadors and remains an untouched example of Inca genius. The Incas created an empire spanning 2,500 miles using slingshots, clubs and stone-tipped spears. Without these of the wheel, they built a vast and sophisticated network of roads. Without a written alphabet, they governed a population of ten million people. It is illustrated throughout with detailed colour artwork by Amy Crehore, specially commissioned for this book. "The Wonders of the World" - the award-winning series tells the stories behind humanity's most extraordinary creations.