Great graphics but they don't even begin to convey the sheer complexity of what happens underneath the pavement. For starters, there is rather a lot of archaeo

Great graphics but they don't even begin to convey the sheer complexity of what happens underneath the pavement. For starters, there is rather a lot of archaeology missing. Any reasonably old town or city is built on the strata of its past. Terry Pratchett spelt it out in several of his books rather better than I can, so feel free to investigate that. That said, I defy anyone not to be a bit beguiled by the pictures in the OP.