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Ruins of castle built in the 16th century on the remains of an even older (11th century?) castle, destroyed in 1689. Located at the very top you can get a great view of the town and the surrounding countryside. During summer the ruins are sometimes used for theatre performances. If you walk from the ruins past the Ruprechtsturm downstairs to the Clock Tower you might notice a huge chunk of curved brickwork (to the left of a small viewing balcony, nowadays almost completely overgrown). This is a piece of the castle's round main tower. Despite weighing several tons, it was hurled hundreds of meters when the tower was blown up in 1689.
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"Schneiderturm"
Small stone tower built in 1903 on the foundations of the old Schneiderturm, which was destroyed in 1689. The 13th century Schneiderturm (Tailors' Tower) was part of the city fortifications. Various guilds had to guard different parts of the city, and the physically weak tailors were assigned responsibility for this easy to defend steep decline.
Katharinenkirche
Built 1220-1439, often named 'the most outstanding Gothic church on the Rhine between Cologne and Strasbourg'. Some of the stained glass windows are still genuine from the 14th century. Sometimes (mostly Sundays) the church's main tower is open for visitors. If you get a chance, do climb it. The effort of the many stairs is rewarded by a spectacular view of the town.
Renaissance well built 1546. The name and the well's design stem from the three "Geschlechter" (noble houses) Dalberg, Frankenstein and Gemmingen.
Oppenheim Cellar Maze
under the Old Town, sometimes also called Stadt unter der Stadt (City beneath the city). Spurred by the city's uneasy past and the soft yet sustainable soil, Oppenheim's medieval inhabitants dug at least 40 km worth of tunnels and rooms beneath the 'visible' city. Among other things, the St Catherine's Church's stained glass windows survived here not only several medieval wars but also WWII bombings. A part of the tunnels have been made accessible to the public. Guided tours (in several languages) are offered by the town’s tourism and festival play bureau. The underground rooms also sometimes host theatre performances and other events.
Last remaining gate building of the town's 13th century fortifications. The Gautor was in fact the inner of two fortified gates, the outer one no longer exists.
Uhrturm
The lower part is what remains of the 13th century "Zollturm" or "Weißer Turm" (Toll Tower or White Tower), which was part of the city fortifications and destroyed in 1689. The upper part was built in 1843-44.