Wernerseck
Right, the 22 meter high keep.  Some sections have been obviously repaired or restored.
Right, the primary entrance to the keep, showing the modern door.  At the base of the doorway are two base pedestals for the platform at the entrance.
Left, part of the base of one of the walls showing the deterioration of the structure.  While some cement paste has been applied in the recent past, in large measure the structure of Wernerseck is authentic and largely unchanged short of the decay that it has suffered.
Left, a view along the wall that surrounds the inner ward.  There is evidence that this wall may have included enclosed living quarters.
Right, several views of sections of the walls.  If you look very closely in the upper photo, he you can see some people within the narrow gap at the corner of the walls.  This appears to have been a small tower used to provide protection along each of the walls. 

The next photo shows one of the small towers and the damage that the elements have wrought on the structure.  Wernerseck is not in very good condition and in no way should you crawl along the walls.
Left, a close up of the tower seen in the photo above.  This tower appears to have had small platforms within.  Moreover, the arched section at the base implies that there was an enclosed area along the wall.
The opposite view of the wall that covers the inner ward.  It is obvious from the visible wear that people have actually gotten on top of the wall and walked along it.  Again, not a very good idea with this castle.
Left, a view upwards along the corner tower.  A wooden platform can be seen indicating some effort at reconstruction to allow visitors to access the area.  Or perhaps it was just done to hold the section together.

Below, another view of the inner ward.
The keep was rebuilt to some extent with the obvious intent of allowing people to access it.  Apparently, the structure was either too dangerous to allow people to go in it, or there is still the intent to finish the work and open it.