Unmarked roads and tracks lead to the old ruined harbour, brick works and rock arch of Porth Wen on Anglesey.

 Bardsey Island was considered one of the most sacred places in Britain. Visit the holy well at the old embarkation point.

 Harlech Beach, with its backdrop of mountains and a ruined castle, is probably the wildest and most beautiful stretch of sand and dunes in Wales.

 Historic, remote and beautiful, Mwnt is one of Wales’ most perfect coves, sited beneath a tiny church with opportunities for snorkelling nearby.

 The Witch’s Cauldron is a dramatic inland lagoon with a beach, formed when a massive sea cavern collapsed. You can swim in through various cave and waterfall entrances.

 Abereiddi Blue Lagoon is a drowned slate quarry, now breached by the sea, with a series of jumps from the old engine house.

 Two islands onthis stretch both have caves that pass through their centres. Close to the famous Sloop Inn.

 Saint David was said to have been born at the holy well above St Non’s Bay, where the modern sport of coasteering evolved.

 Druidstone is a magnificent, remote stretch of long sand. A hotel with an excellent bar is perched above.

 One of the most spectacular stretches of coast in Britain. St Govan’s Chapel is hidden in the cliffs, plus many more caves and sea caverns, and the beautiful beach of Barafundle.

 A secret tunnel leads to the white sands of Skrinkle Haven.

 Bluepool Bay on the Gower has rock arches, sand and a very deep rock pool into which you can jump from ledges.

 The little-known beaches of Mewslade and Fall on Gower lead to Worm’s Head tidal island where Dylan Thomas was once stranded overnight.