I was hoping to do another circular walk, this time the one around Mersch. Unfortunately we took a wrong turn near the beginning and ended up on a new part of the PC 14 cycle path heading to Schoenfels castle instead. Still it was a nice comfortable 7km walk taking about 2 hours at leisurely stroll with a dog more interested in smelling the flowers (and less pleasant things) than walking!
Here's a photo of the castle. Not exciting, but they apparently use it as a homeless shelter - or at least it houses the local homeless charity stemm.lu.