Nairn Museum

Large star-pattern fortress built in the aftermath of the 1745 rebellion, to ensure no repetition (which its predecessor in Inverness had lamentably failed to achieve). It's been in continuous use since as an army base, and is therefore in good condition, but as the MoD don't expect further Jacobite attack it's expected to close in 2032. The ramparts are almost a mile long and there's a regimental museum, an arsenal of old weapons, chapel and military dog cemetery.