In this case the forest is the Schönbuch forest, just south of Stuttgart.
And in this case the tower is the Schönbuch Turm, located at the highest point of the forest, and providing a spectacular view to anyone brave enough to climb it.
Here is the sign you‘ll see along the way to the tower:
And here is what you‘ll see when you come to the tower:
And finally, this is a view from what it looks like at the top!