"observatory" - key terms from Wikipedia

aldershot observatory
allegheny observatory
arecibo observatory
astronomical observatory
david dunlap observatory
european southern observatory
greenwich observatory
griffith observatory
hawaiian volcano observatory
herschel space observatory
hopkins observatory
indoor observatory
infrared space 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
neutrino observatory
nice observatory
number one observatory	circle
observatory
observatory	hill
observatory	house
orbiting carbon observatory
outdoor observatory
parkes observatory
royal greenwich observatory
royal observatory
sierra nevada observatory
solar observatory
special observatory
states naval observatory	flagstaff station
summit observatory
underwater observatory
united states naval observatory
united states naval observatory	flagstaff
van vleck observatory
vesuvius observatory
william spain seismic observatory
yellowstone volcano observatory
yerkes observatory