The mighty Apurímac River rushes through a steep valley in the Andes Mountains near Peru’s formidable Choquequirao trail, a route that leads to Inca ruins high in a cloud forest. The Choquequirao trek is considered by many to be the top adventure travel destination on the planet. Click the above image to enlarge, click to view my high-resolution photo gallery, or click to read my travel guide “How to Hike to Choquequirao.”