Chile’s Atacama Desert is one of the best places on the planet to stargaze, thanks to its nearly cloudless skies, high altitude, and low light pollution. On QuasarChile’s Highlights of San Pedro and the Atacama Skies tour, take day trips to such sights as the desert’s rugged Moon Valley, the Miscanti and Miñiques lagoons at 14,100 feet, and the Atacama Salt Flat—a hangout for pale pink Chilean flamingos. During nighttime sky-watch sessions, staff from the area’s many observatories show you where to see supernova remnants, star clusters, and galaxies. The small town of San Pedro de Atacama serves as your base. From $3,115 for a four- day trip, including lodging and meals.