Longleats looks like an amazing place to set all sorts of games, from a Gothic murder mystery to a Regency court intrigue.
Besides being an elegant manor in the English countryside, it has a peculiar structure: there's an older house, surrounded in later years by a larger rectangular building easily doubling its size. What secrets does that old house hold, and did someone feel a need to imprison them there?
The rooftop, especially the older part, is full of walkways, isolated turrets, and rows of chimneys. Great for a chase scene, a fencing duel, or a break-in once someone has scaled the outer walls.