Stirling Castle is the most castley castle anywhere.
Kilsyth town is a terrible place but the area around it is really nice. Loch Banton and Colzium estate, especially in the autumn rain. Auchinstarry Quarry. There are the remains of the Antonine wall around there (this is as far north as the Roman empire got).
My first computer was the zx spectrum with 256k RAM