About halfway between Malahide and Portmarnock along the coast road you will come to what looks like a castle turret with a house added to it (on your right hand side coming from Malahide) and theres a bus-stop opposite it. Stop here and go down the steps on to a small beach that has a lot of different rock formations. The sea is crystal clear and Lambay Island is straight out in front of you. Its a nice walk and the rock formations are amazing. Different colours and textures and types of rock. Great place for some seascape shots especially if you get a dramatic sky behind Lambay.