Trifels, Scharffenburg, and Anebos
There is virtually nothing left of Anebos (left), and its history is little known.  It was apparently a small fort that served as a way-point between Trifels and Scharffenburg, and like Trifels, had been the site of an original Celtic hillfort.  Today, there are just a few stones left embedded in a sandstone column.

Below, Scharffenburg as seen from Trifels.  The castle is relatively small and was dominated by Trifels's location and strength.  Indeed, its primary purpose was to help protect Trifels from attack, having been built sometime in the 12th Century.

These photos were taken in 2005.
Scharffenburg's keep is of a simple square construction, with virtually no breteches or battlements.  The top is not even crenelated.  Therefore, it is apparent that its real claim to protection was the difficult terrain about, rather than the careful design.  This would have reduced costs, but at the price of enhanced defense.

The keep is closed to visitors, and the photo below demonstrates part of the reason why.  The sandstone ledge it was built upon is slowly crumbling, and there appears to be evidence of past and recent efforts to shore it up to prevent its collapse.
The two photos below show a little of what is left of Scharffenburg.  The one on the lower left shows the rebuilt stairs taken one into the inner ward or bailey.  The sandstone layers are visible to the right.  The photo below shows part of the entrance tunnel, now mostly collapsed, that led to the inner ward.