I was watching an episode of Dr Who on dvd last night and he says "where in time do you want to go" and I thought about just that, Sanctuary. Wouldn't it be disappointing if it was just some megalalithic priest's mid life crisis building something bigger than anyone else had.
I must admit, I carve stones with my own versions of spirals and cup and ring or other suchlike marks. I then throw them into pools all over Scotland, preferably really deep ones like at Pattack Falls, say. I like the idea someone will find them in 300 years and say, this si modern, it isn't in the right time period, what the hell was going on there then?