The remains of the castle can be visited
CastleErbes-Büdesheim
Erbes-Büdesheim Castle

Die "Blaue Burg"+
The "Blue Castle" in the northwest, between the end of Pankratiushofstrasse and Grabengasse, of which only two tower stumps remain today, was probably built before 1488 and most likely destroyed in 1504 during the Palatine-Bavarian War of Succession.
Source: wehrbauten.de · Image: http://www.wehrbauten.de/thread.php?threadid=1447
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Location: 49.7583, 8.0314