South Wales was the center of coal mining during the Industrial Revolution, with Cardiff becoming the largest coal exporting port in the world.  We recently had a chance to visit the Gulbenkian Prize winning Big Pit National Coal Museum located in Blaenavon and made our first descent into what was once one of the largest working coal mines.  While photography is prohibited in the mines, we give you a visual tour through what we could capture.  The informative tours offered here let you have some fun (you get to gear up like the miners and test their equipment) and provides some not so fun facts (little children got killed working here, horses never saw daylight and  more).  To learn more about visiting Big Pit, please visit their excellent website at http://www.museumwales.ac.uk/en/bigpit/