An excellent way to explore the fascinating Inca cosmovision. They defined constellations of darkness as well as light, used astronomy to predict weather patterns, and designed Cuzco’s main streets to align with constellations at key moments. After an indoor presentation in English and Spanish there's high-powered telescope viewings outside. Reservations are essential; price varies with group size, and includes pickup and drop-off. The planetarium van picks up visitors at 5:40pm from Plaza Regocijo.