Burgruine Landskron
During the summer months, concerts and open-air theater perfrmances take place in the Burgruine Landskron, the 12th-century imperial fortress ruins. From here, there's a wonderful view of the town and the vineyards, extending all the way to Mannheim and Frankfurt on a clear day. The castle ruins are northwest of the church. Follow Dalbergerstrasse north; from there it's a short, steep walk up to the ruins. For tickets to the performances contact the Oppenheim tourist office.