The Arfon transmitting station is a facility for FM radio and television transmission near the villages of Nebo and Nasareth in Gwynedd, northwestern Wales (grid reference SH476493). It includes a 308.5 m (1,012 ft) guyed mast with antennas attached at various heights. The mast is surmounted by a television transmitting antenna, which brings the total height of the structure to 317.4 m (1,041 ft), making it the tallest structure in Wales.