Schmidtberg
Right, one of the walkways through Schmidtberg.  The passage bears marks that it may have once been worked to create a long stairway.  As it is today, it is thoroughly worn.  However, it is an authentic aspect of the castle.
Right, a view into one of the work areas.  The upper part of walls have been smoothed out with mortar to prevent further decay.  Nevertheless, you can still gain a good image of the layout of the castle and how daily life progressed.
A good portion of the castle uses the rock on which it is built to provide walls and passageways.  This view is towards the area near the main palas.
Right and below, the main keep is closed and apparently used to store some tools used in restoration work.  The keep was once a near total ruin and so the upper portion seen here has been restored.  The lower portion, such as the passage beneath (in the right photo) is authentic though having received some maintanence.
Below, scattered about the castle grounds are authentic pieces of the structure, such as window and doorway moldings as seen below.
Above, some sections of the castle show that lower levels were once extant.  In the section above, there appears to be a debris field of possibly four to five feet.  The entrance to the back left was actually an entrance on an upper floor!

Right, an example of authentic molding, probably restored in place at a later date.