The interior,looking west.The circle of slate,in the foreground,was the area upon which Prince Charles was invested with the title of Prince of Wales,in 1969.
see http://www.infobritain.co.uk/Caernarvon_Castle.htm
see http://www.castles.me.uk/caernarvon-castle-welsh-mythology.htm
see http://en.wikipedia.org/wiki/Caernarvon_Castle
Unlike most castles I've been to,at Caernarvon,you can safely climb every tower,walk inside and on top of every wall and wonder at the splendour and majesty of the building.The hills visible in the upper left of image,are on the Lleyn Peninsula.
see http://www.cadw.wales.gov.uk/default.asp?id=6&PlaceID=19#