The unique, onsite stone and domed Maria Reiche Planetarium features daily evening programs (“Colca: Deep Canyon, Deep Sky”), in both Spanish and English, focusing on the constellations of the Southern Hemisphere and Inca cosmology. Trained astronomy guides instruct guests in observing the moon and stars in the vast Colca sky - virtually unpolluted by artificial light - with a professional telescope.

In high-altitude Colca Valley, guests have the unique opportunity to observe constellations only visible in the Southern Hemisphere, including the Southern Cross, Centaurus, and the Southern Milky Way.