A moated enclosure in the Dee Valley at Glyndyfrdwy is the site of the house of the last true Prince of Wales, Owain Glyndwr. On this site on 16 September 1400, Owain and a band of Welsh lords decided that the time had come to rid their land of the English who had persecuted and robbed the Welsh people since their defeat at the hands of Edward the First in 1282. Two days later they crossed over the hills to the Vale of Clwyd and razed Ruthin to the ground starting a glorious but doomed liberation movement that lasted over a decade.

As well as being a hero, it seems that Owain had an interest in prehistory. There is a cup-marked stone just outside the moat on the eastern side.

Location: Denbighshire, Wales
Grid Ref: SJ12754309