Porth Nanven, a secluded cove at the end of Cot Valley near St. Just in the far west of Cornwall, has a really interesting pebble beach from the middle of the tidal zone upwards. Here you'll see pebbles that were once shaped on a 'fossil' raised beach from a warm interglacial period 120,000 years ago have fallen onto the modern beach far below and are now getting a second washing and rounding in the rocky cove by the waves of the Atlantic Ocean. Above the old raised beach is a thick layer of peri-glacial head indicating that it has also been very cold here in not so distant times, so if you're into Global Warming then you'll likely find this place quite fascinating! Porth Nanven is accessible by car down a narrow lane but there is only space for a handful of cars to park at the bottom. Access down onto the beach itself is difficult and only for those with plenty of stamina and a good sense of balance to navigate across the large uneven boulder-sized pebbles and rocks, but it is well worth it to see those large egg shaped boulders and the rounded red-veined granite rocks which look like they could be alive just after the tide has gone out. A photo enthusiast's paradise - bring a tripod and plenty of patience with light and tide.