i finally found a bit better source in my old photos
a real-live abandoned Lead mine in Iron County, Missouri. ( I cloned the Mystery Machine in there )

Click for bigger (127KB)
...and now I have lost interest in this :)
(
PedroHin Come along & ride on a Flantastic Voyage,
Fri 27 Apr 2007, 19:37,
archived)
I like this one better
especially the centre
(
mediocre ha ha ha, you're reading this,
Fri 27 Apr 2007, 19:42,
archived)