Senckenberg Naturmuseum, Frankfurt am Main, Germany.
This is a close look at a large rock standing on the grassy traffic island in front of the Senckenberg Naturmuseum. The grain shows how tortured this rock was when it was still soft.
Your photos are making me want to finally visit that place!
I also just realized that the Night of Museums is next Saturday, so that will be a good occasion.
oh WOW, the Nacht der Museen (Night of Museums) looks like great fun, and the price is excellent! i guess i know what i'll be doing next saturday!