The remains of the castle can be visited
Scharfeneck Castle

Northeast of Oberscheinfeld on the Schlossberg is the castle ruin of Scharfeneck, a spur castle. Of the original complex, the keep remains today, serving as an observation tower.
History+
The origins of the castle, known as "Veste Scheinfeld" until the 16th century, likely date back to the 6th century, founded by a Frankish nobleman. In the High Middle Ages, it was the ancestral seat of the noble family of Scheinfeld. Around 1202, Knight Friedrich de Scevelt pledged his property to Bishop Thiemo of Bamberg before participating in the Fourth Crusade. After his death, the castle passed into the possession of the Diocese of Bamberg. In 1339, it was mentioned in the Bamberg castle guard register when Johann von Dachsbach received a hearth there. After 1366, the castle changed hands several times.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Mobile Geschichte
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: 49.7138, 10.4446