The sounds of Cleddon Falls in the Wye Valley, high above Llandogo. Have you visited? Legend has it that this roar is the sound heard by Wordsworth on his visit to the Wye Valley which inspired 'Lines Written a few miles above Tintern Abbey' : "...and again I hear These waters, rolling from their mountain-springs With a sweet inland murmur" https://www.visitmonmouthshire.com/things-to-do/cleddon-falls-and-cleddon-shoots-p2321001 Thanks to @matt_stinsonsbs for the video, taken in December last ye