Thank you!
I have broken down the level into 3 distinct areas, the level start all the way to the tower that leads to the exterior, the exterior itself and the final area which is the lower levels of the castle. Previously, I had to finalised the geometry for the first two areas but felt the final area wasn’t up to the par with the other two. Therefore, after taking another look I was able view it from a fresh pair of eyes and decided to redesign some of those areas, adding more depth and interesting environments, those areas are now more interesting and really do add to the overall aesthetics of the castle, the new additions really do help to create an atmosphere that makes it feel like a real castle rather than a level with rooms that link etc. For example, I extended the final area which adds very little in terms of time spent in the level but hopefully people appreciate it. The archway on the right will lead to a small room with a table and a window to look out to the open landscapes, ocean and lightning weather and so on.
Here is my reference.