Here is my Fortified Tower from Tabletop World – large defensive structure made of stone. I did not want it to be too boring, so I painted random stones in different colors than grey and in crevices I applied some vegetation made of pieces of green sponge.
By default this building has two storeys:
I could not stand that the lower part of the tower is not used so I cut it and made ground floor with some really basic interior:
To show how big is the tower – here is picture with 28mm miniatures:
