"observatory" - key terms from Wikipedia

aldershot observatory
allegheny observatory
arecibo observatory
armagh observatory
astronomical observatory
european audiovisual observatory
european southern observatory
fountain of the observatory
greenwich observatory
griffith observatory
hopkins observatory
indoor observatory
jodrell bank observatory
lick observatory
lowell observatory
main observatory
manila observatory
mauna loa observatory
mauna loa solar observatory
mount laguna observatory
mount washington observatory
mount wilson observatory
national astronomical observatory
national observatory
naval observatory
nice observatory
number one observatory	circle
observatory
observatory	and planetarium
observatory	bay
observatory	hill
observatory	house
observatory	of the future
outdoor observatory
parkes observatory
royal greenwich observatory
royal observatory
sierra nevada observatory
space observatory
special observatory
summit observatory
underwater observatory
united states naval observatory
van vleck observatory
vatican observatory
vesuvius observatory
william spain seismic observatory
wilson observatory
yellowstone volcano observatory
yerkes observatory