Climb high into the Andes Mountains of Peru to discover Machu Picchu, the hidden city built by the Inca Empire. How did the Inca people build such an amazing city with huge stones, and why was it abandoned? This book is your guide to one of the world's most mysterious ancient cities. Uncover these exciting facts and more through entertaining photos and easy-to-read text that supports struggling readers and engages wannabe investigators alike.