Other sites that were under discussion included Cerro Macon, Salta, in Argentina; Roque de los Muchachos Observatory, on the Canary Islands; and sites in North Africa, Morocco, and Antarctica.
Lokasi lain masuk dalam pembahasan termasuk Cerro Macon, Salta, di Argentina; Observatorium Roque de los Muchachos, di Kepulauan Canaria; dan lokasi-lokasi di Afrika Selatan, Maroko, dan Antartika.