The planetarium experience could have been amazing, but, for us, it fell short mostly because the sky was quite hazy. That happens largely because of the pollution in Cusco. Our guide only showed the Greek version of the constellations in the planetarium. The presentation before we went into talked about the Inca general view of celestial objects. The telescopes set up outside were interesting but most of us had seen that before. The haze caused by pollution really got in the way.