> It is almost impossible doing some digging for infrastructure without coming into some old structure.... usually mosaics, old villas, old graves, etc... Or i

> It is almost impossible doing some digging for infrastructure without coming into some old structure.... usually mosaics, old villas, old graves, etc... Or if you're _very_ unlucky, an unexploded bomb from the 1940s in a questionable state of chemical decay. https://www.huffingtonpost.co.uk/2012/03/15/london-2012-olympics-bomb-nazi_n_1346801.html https://www.huffingtonpost.co.uk/2012/03/15/london-2012-olym... https://www.dw.com/en/500-kilogram-wwii-bomb-sparks-evacuation-in-frankfurt/a-55836768 https://www.dw.com/en/500-kilogram-wwii-bomb-sparks-evacuati... https://www.bbc.co.uk/news/uk-england-london-43027472 https://www.bbc.co.uk/news/uk-england-london-43027472 https://www.bbc.co.uk/news/av/world-europe-24799937 https://www.bbc.co.uk/news/av/world-europe-24799937