Oberle Observatory
Observatory Park
10610 Clay Street
Montville Twp., OH 44064
The Oberle Observatory is a key component of the Geauga (County) Park District’s impressive Observatory Park. The Observatory has a partially retractable roof to allow direct sky viewing for the 25.5-inch Newtonian reflector telescope donated by the estate of Norman Oberle, a legend among Ohio telescope builders. The observatory features a climate-controlled control room, data and image displays visible from the exterior, a weather station, a seismograph, Internet connectivity, and outdoor stations for portable telescope setups. The recognized dark-sky site is equipped with red filtered walk and parking lot lights and earthen mounds shield the observing area from automobile headlights. The Observatory was dedicated August 20, 2011 with a “first light” ceremony.
Photo by James Guilford
Observatories of Ohio 
The driveway needs to be marked a little better than it is now. I could not find it. I did see the Nassau observitory, but never saw a way in.
Too bad, it’s quite a place, especially Nassau! I haven’t been out there in a while but looking at Google Streetview images, the park system had a simple wooden, unlit sign at the driveway entrance. Since the Nassau Observatory is now part of Observatory Park, it’s likely access is via the main park area. See Google Maps or your favorite service for directions from your location.