 Headframes have become prominent features in historic mining regions.The Ruhr district of Germany and the South Wales Valleys in Britain are both examples of areas which are now associated with headframes due to the large number constructed to mine coal during the Industrial Revolution.Most of these headframes have now been removed although both regions have turned non-operating mines with headframes into national museums; the German Mining Museum in Bochum and Big Pit National Coal Museum in Blaenavon.