Within the Southern hemisphere, Chile offers the best of excellent opportunities to study the universe, especially north Chile has the advantage of a clear atmosphere.
This, combined with a stable climate and few cities [thus no interference of light], makes Region II, III and IV a paradise for astronomers. The majority of the observatories is for scientific purposes only, where visitors can't look through telescopes, but they cán do this at the observatory of Cerro Mamalluca in the Elquí Valley of Norte Chico [Region IV].
Guided tours are given in small groups in either English or Spanish. From the observatory tour.