John Payson Williston Observatory
United States
The John Payson Williston Observatory is an astronomical observatory located at the highest point on the Mount Holyoke College campus. Constructed in 1881, the observatory is a modest building with a rare 8" Alvan Clark refractor telescope created just before his death in 1887. It is maintained and operated by the Mount Holyoke College Astronomy Department.
Observatory data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).