1) Castles that have well-preserved Medieval interiors that one can walk through. (courtyards, stairs, halls, towers, and -in a dream world-furniture!)
2) A lighthouse or tower that one can go in and climb up. The plot centers around a tower, so I am desperate for this one!
3) Places (castles or beaches) with caves or underground passages (again- for plot)
4) Monastic buildings that give some feel of the interior.
5) Roman structures (Not just tumbled stones)
5) Anything Saxon!
Thank you so much!