In collaboration with the
International Astronomical Union

Category of Astronomical Heritage: cultural-natural mixed
Windows to the Universe (multiple locations): Mauna Kea Observatory, Hawaii, USA

Mauna Kea observatory
Cerro Tololo from the north
Cerro Tololo from the east
Cerro Tololo
Gran Telescopio Canarias
Cerro Tololo night sky
Remarkable observing sites
Cerro Pachón (2011)
Cerro Pachón from NW
Observatorio del Teide
Cerro Tololo plan
El Totoral plan