A growing number of itineraries are linking Northern Peru’s archaeological sites and Amazonian biodiversity with Chile’s Atacama Desert, famed for its salt flats, lagoons, and world-class stargazing.

Peru and Bolivia together offer a dream mix of ancient history, jaw-dropping landscapes, and vibrant culture. From Lima’s food scene to Machu Picchu, Lake Titicaca, and Bolivia’s surreal salt flats, ...