The village of Landeck is halfway up the mountain, so you get a nice view of Mundingen with the Black Forest in the back.
Ah yes, the structure is in a somewhat sad state, same issue with all German castle ruins.
From time to time it happens that people climb walls that better be not climbed and then get hurt or killed in the process. It has happened a few times so that there are now lots of signs telling you that you can't go in. Well, there ain't much to stop you, though. Let's take a look inside..
..as well as in and out of the window:
The chapel and below: