Chak-Chak hotel observatory is a special place for both scientists and tourists while it serves facilities for both groups. This building is proposed to place into the Chack-Chak mountain near Ardakan City, Iran. The aim of defining this project was to combine three scientific realms(Biology, Astronomy, and Geology) together and have them cooperating together in order to detect the environmental threatening phenomena of the Siahkooh desert and protect both landscape and creatures. It also attracts tourist to visit this place and enjoy the vernacular aspects of pristine desert and especially its sky. This project includes 67 rooms for tourists and other facilities as a resort and 3 laboratories for researchers, specialized astronomy library, planetarium, and astrobiology museum.