The footpaths are not at all clear on the short grass. One path goes off at an angle to the left, heading for the small section of limestone pavement. The other path keeps to the right, near to the stone wall, and heading for the larger sections of 'pavement'. Just on the right of the photo is the gateway SH7583 : Iron Gate on the Great Orme .
Yes, these and many other structures around the orme are remains of gun defences - my grandfather was one of the engineers who constructed them. I'm trying to find more information on this as we speak!SH7583 : Gun Emplacement on the Great Orme?