Other sights in PembrokeshirePembrokeshire, Wales

Limestone sea arch spanning around 24 metres above the waves on the Castlemartin coast.

Two limestone sea stacks off the Castlemartin coast, a breeding ground for guillemots and razorbills.

A flooded slate quarry on the Pembrokeshire coast at Abereiddi, its water an improbable milky turquoise — a coasteering amphitheatre that has hosted world cliff-diving championships.

Rocky Preseli summit above Newport crowned by an Iron Age hillfort, known as the Mount of Angels.

Rocky tor above Whitesands Bay near St Davids, giving wide views over the peninsula and Ramsey Island.

Deep, sheer-sided limestone chasm on the south coast near Bosherston, named for a folklore leap.

Rugged headland at the western tip of Wales below Carn Llidi, rich in prehistoric remains.

Limestone headland at the south tip of the Castlemartin peninsula, above St Govan's clifftop chapel.

Tiny limestone harbour on the National Trust's Stackpole estate, start of the walk to Barafundle.

Rocky headland with a lighthouse west of Fishguard, a prime spot for watching seabirds and porpoises.

Collapsed sea cave and blowhole on the coast near Moylgrove, linked to the sea by a natural arch.