Facility Info
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Exhibits Space
- Reception Capacity 150
- Banquet Capacity 150
- Number of Rooms 5
- Classroom Capacity 130
Tours available Thursdays-Mondays from May till October and two to three days a week during the shoulder seasons. Tickets available ONLINE ONLY. Click HERE for more information and to reserve your tour or event.
Hello, 2024! WE ARE OPEN! Yerkes Observatory, the birthplace of modern astrophysics, is an architectural masterpiece on fifty acres of Olmsted-designed ecological splendor. Since 1897, Yerkes has been the home and school to famous astronomers, Nobel prize winners, and renowned scientists but we're now open for public tours, observing nights, star parties, weddings, exhibits, trail walks, and more. The world-famous Observatory's beautiful location in Williams Bay, Wisconsin is only twelve minutes from downtown Lake Geneva. We are on a new voyage under the stewardship of Yerkes Future Foundation, a nonprofit 501c3. All proceeds go to the restoration, preservation, and programs of this international landmark of astronomy, architecture, and landscape design. Don't miss these behind-the-scenes, out of this world, restoration tours! For further information, please visit our website.
Yerkes Concert Series: AREPO in the Great Refractor Dome
May 22, 2025 - May 23, 2025Y.O. Speaker Series: Dr. Amanda Bauer Talks "Cosmic Vertigo"
Jun 12, 2025 - Jun 12, 2025Y.O. Speaker Series: Architect Jeanne Gang
Jul 17, 2025 - Jul 17, 2025Y.O. Speaker Series: Family-Friendly Astronomy with Dean Regas
Jul 24, 2025 - Jul 24, 2025Y.O. Speaker Series: Dr. Katie Mack Presents "Physics at the End of the Universe"
Aug 14, 2025 - Aug 14, 2025