Glass Castles: The Mystery of Scotland's Vitrified Forts - were these accidental side effects or destruction of these Pictish hill forts or were they intended as a form of architecture?
I explore a number of Scottish Vitrified forts to find out
and concluded at the best example in Aberdeenshire of Tap O Noth
Arthur C Clark's Mysterious World back in 1980 look at the issue and I revisit that tv show
#taponoth