Located at Ban Laem Pho cape some 17 km. from town, it is a huge rock slab evolved from uncountable shell fossils of some 35 million years. This shell graveyard was once a large freshwater swamp populated by millions of snails. Over aeons, the dead snails gradually formed a layer of fossils, which is about 40 cm. thick. This wonderful site of nature has become one of the most popular attractions of Krabi and one of the three in the world.