A caver is filmed squeezing through a very tight gap in a south Wales cave on July 6.<br /><br />Footage from Northern Lights in Ogof Ffynnon Ddu shows the caver go through deep water and eventually get themselves through the tight geological formation.<br /><br />The filmer jokingly said: "I’m often asked why I go caving and the answer is, 'Where else could you have as much fun as this?'"
