Have you ever visited Carn Euny Ancient Village in Cornwall, down on the furthest point past Penzance. We were there some years back and the lichens seemed to have a purple glow in the darker areas, or is was on something 
You sound a mad as my father. Did a geology coarse when he retired and dragged my mum down quarries looking at stones. Everywhere we lived here would collect stones from around the country and do something in the garden. He built a huge retaining wall all by hand at one place. We travelled back from top of Scotland in a car with no suspension as the whole rear had rocks laid across and the luggage on top. I even have scars from the heavy bolders we used to lift, my little finger bone is split at the end. My dad was a very strong man in his younger days.
Brother (inhis 20's), got his body builder mate to arm wrestle with him, dad said after easily beating him that he put on a bit of an act so as to not completely embarrass him it was so easy. I was also strong for my age (and older, now a weakling), so the boulders we used to move were on the rather large side. When he retired he decided to redo the concrete drive and removed with a sledge hammer, decided the pains in his chest were because he hadn't been working hard enough lately and continued to work through it. Yes, he was having a heart attack but only told us a few years later when he was out of breath walking up a hill.
So i get the type of person you are......nuts
