A line of anti-invasion defences, probably 'Dragon's Teeth' surviving in dunes at Black Rock Sands, approx. 170m inland from the mean high water mark.
The defences form a line, approx. 180m in length, west of the Morfa Bychan caravan park (47 blocks) and extend a further 130m into the caravan park, forming an intermittant southern boundary (21 visible blocks).

The blocks were recorded during aerial reconniassance by RCAHMW on 13th June 2008.
L. Osborne, 19th September 2012.