Found this Trackable in my Cache "In The Grasslands Away" , which is a cache dedicated to the music of Pink Floyd. Considering the fact that Roger Waters performed a concert at the site of the former Berlin Wall in Potzdammer Platz, I was thrilled to discover it on a cache check. Thank you to Jeisel24 for leaving it, and to Nilpferd1607 for starting it's journey back in 2013. I will pass it onwards !