Considering the Trierer Hof in Koblenz?
A VT member wrote the following comment about visiting Koblenz:
They have a festival once a... by hokeypokey
They have a festival once a year and we just got into Koblenz at that day without having heard about it before. (Somwhen in the beginning of august) Thereīs pretty much going on in town and itīs just all a big party. Not even the busses run on time or at all.
You just have a fun time and they have an open air party or concert at the 'Deutsches Eck'. Around midnight they have a firework which we saw standing at the castle. Amazing!