I hope you find these useful when translating images of real structures on into your gaming world view. From there it's just a matter of simply raising the height of your wall features to make up for base thickness elevation.
Remember we are playing with men that are walking about on 8 or 9-inch heels!
The first one is not really scale-specific:
With this next one, each square millimeter of the "15mm" based figure (1/100 scale) is roughly 4 inches:
Lots more for you here:
https://flic.kr/s/aHskDEYSamEnjoy,
Dan
https://www.flickr.com/photos/9593487@N07/albums/with/72157670627079974