His terra cotta ornaments include signs of the Zodiac, phases of the moon, unusual animals both real and imagined. In the southeast transept, on the main floor, is the Quester Museum, which celebrates Yerkes astronomers who have profoundly impacted the scientific world and the local community over the past 100 years. It pays special attention to the links created and maintained by Yerkes and the Williams Bay community over the years. The Quester is the fruit of the work of area volunteers interested in local history. There is no admission fee, but donations are welcomed.
Tour guides offer information on the history of the observatory, astronomical research and space.
Tours are intended for families and small groups and reservations are not accepted. For groups of 15 or more, special programs are available, including viewing through the telescope, mini-classes, slide shows and talks. You must contact tour coordinator Richard Dreiser to make advance arrangements. Payment is due at the time of the program. It is a good idea for you to confirm at least 24 hours in advance.