Try out white water rafting during this experience on an inflatable six person raft down the river tryweryn in wales both head down the two action packed runs of the upper tryweryns white water rapids the rapids are graded level three to four on the uks white water grading system which starts at one a few splashes and goes up to six too rough to offer commercially so get ready for a white knuckle ride that will have you screaming with sheer excitement this adrenaline fuelled activity i