Category of Astronomical Heritage: cultural-natural mixedWindows to the Universe (multiple locations): Cerro Tololo, Chile Description Map Gallery Mauna Kea observatoryCerro Tololo from the northCerro Tololo from the eastCerro TololoGran Telescopio CanariasCerro Tololo night skyRemarkable observing sitesCerro Pachón (2011)Cerro Pachón from NWObservatorio del TeideCerro Tololo planEl Totoral plan