The four-day trek on the Inca Trail to Machu Picchu is a definite life-list adventure, but a visit during the wet season (December to March) could leave you mud-caked or foil the hike altogether. For accessible trails and clear views, go in the fall. If you don’t want to hoof it, take the train from Cuzco into the foothills of the Andes Mountains, with views of the Urubamba River valley. Regardless of how you get here, dress warm; highland temps can vary throughout the climb. While exploring Machu Picchu, check out Funerary Rock Hut, frequented by llamas and alpacas. Also, don’t miss the historic town of Cuzco and the famed Pisac Market in the Sacred Valley.