Follow the A55 Expressway towards Bangor, ignoring signs for Llandudno and Conwy. Shortly after passing the Conwy junction, you will pass through the new Conwy Tunnel. The junction immediately after the tunnel is signed for Conwy Marina - leave the A55 by this junction (Junction 17) and follow signs for the Marina. Aberconwy Park is signposted as a left turn off the Marina approach road.