observatory
ob·ser·va·tory
noun
1.
a building designed and equipped to observe astronomical phenomena
2.
a structure commanding a wide view of its surroundings
Origin
Borrowed from French observatoire, equivalent to observe + -atory.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.