My husband grew up in the Ruhrgebiet, an area around the Ruhr River in the German state of Nordrhein-Westfalia. This area in midwestern Germany, not unlike its midwestern counterpart in the USA, is known for its coal mining and heavy industry. Nowadays the mundane contraptions of 20th-century industries can be found amidst nature, slowly encroaching.
The canals of Duisburg, for example, are full of what look like big goldfish. For the Mundane Monday Challenge #71 (on Wednesday).