The remains of the Castle can be visited
Tomburg Castle (Ruin) (Wormersdorf)

The Tomburg ruin, a relic from the Tertiary period when rising lava formed a basalt dome, is on the high Tomberg near the Rheinbach district of Wormersdorf.
History+
The origins of the Tomburg can be traced back to the 4th century, with indications of Roman settlement. Around 900, the hilltop castle was built and expanded in subsequent centuries. Around the year 1000, Count Palatine Ezzo and his wife Mathilde, sister of Emperor Otto III, resided here. Their daughter Richeza became Queen of Poland, while their son Otto inherited the Palatinate and became Duke of Swabia in 1045, before dying at the Tomburg in 1047. From 1090, the Counts of Kleve were the castle lords, followed by the Lords of Müllenark in 1230, who subsequently named themselves after the Tomburg. From the 14th century, the castle lost its military significance and served as a retreat for the Lords of Tomburg, who were known as robber knights.
Source: Wikipedia · Licence: CC BY-SA 4.0
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 50.5954, 6.9739