There’s a tiny lake in Oxford, Hinksey Lake, between a park and the railway tracks, somewhat used for recreation. I was there recently for the first time since the start of the pandemic. I found there were new signs warning people away from swimming — too little avail, as far as I could see — because of the danger of industrial waste dumped below the surface. I could think of many things you might call such a location, such as a “hazardous waste site” or “industrial trash dump”. But in Oxford they call it a “site of industrial heritage”. Sounds like something you might want to make a point of visiting.