Above Abadaron is a viewpoint and former coast gaurd lookout site. Mynydd Mawr. On a plaque there it says it was a military base in WW2. There are several foundations of old buildings there.Much more than just a lookout position would require. Does any one know what was there or have any photographs ?.It is a stunning place with great views over to Bardsey Island. There also are remnants of what look like munitions stores further along the coast at Hells Mouth. Again does anyone know what these were ?.