Porth Dafarch is a small bay on the west coast of Anglesey in North Wales. The inlet is on the west side of Holy Island, Anglesey about 2 mi (3.2 km) southwest of Holyhead and 1.5 mi (2.4 km) northwest of Trearddur Bay. It has a sandy beach and is a popular visitor destination. In 2021 Porth Dafarch beach awarded as Blue Flag beach.

Holyhead Breakwater is situated at the north-western end of Holyhead in Anglesey in North Wales. The Victorian structure, which is 1.7 miles (2.7 km) long, is the longest breakwater in the United Kingdom. The breakwater, which is accessible in good weather, has a promenade on top which leads out to the Holyhead Breakwater Lighthouse.