This is my Helms Deep that was inspired by the official LEGO set, the books, and the movie. I integrated many of the best parts of the official set into it while expanding on it and adding more detail and magnitude.
About this creation
This is the Top view of the Main Fortress Keep at Helms Deep
The Back of the Deeping Wall along with the place where the orcs blast it blowing open the gap during the battle.
This is a side view of the Hornburg where Gimli blew the horn right before the remaining riders of Rohan and King ride out for a final time against the orcs. There is a interior to it as well as a ladder to the top and Gimli is standing at the horn on the top. At the bottom is the stairs and entrance to the main keep from the Deeping Wall.
This is a top view looking down from behind the keep showing the ramparts and 2 levels of the Keep.
Side view of the Keep where it was built into the mountainside along with the small exit Gimli and Aragorn use to fight off the orcs trying to break through the main gate.
View of the final gate into the mountainside retreat of the final defenses of Helms Deep. The single door on the top of the wall leads to the ladder to the top of the Hornburg.
The staircase behind the first wall of the main fortress that leads up to the ramparts and eventually to the bridge over the grounds to the 2nd wall of the main fortress. It also connects to a path the the Deeping Wall ramparts.
Some of the interior, including the entrance and ladder to the top of the Hornburg, a storage area and in the bottom left corner is the armory that is accessible from an entrance to the left of the stairway leading up to the ramparts of the first wall of the main fortress.
Additional photos plus these photos all at full size can be found on flickr under the user LegoRyu.