Ganondagan is a National Historic Landmark and the only New York State Historic Site with a Native American theme, preserving the only Seneca town developed and interpreted in the United States. It spans 569 acres and is the original site of a 17th-century Seneca town. The Seneca Art & Culture Center is open Wednesday-Saturday 9 a.m. to 4 p.m. and is closed from mid-January to mid-February. The Bark Longhouse is open Wednesday-Saturday 10 a.m. to 4 p.m., May 1 through October 31. When group tours are scheduled, the site may temporarily close for capacity limits.