Cornwall - lots of mussel-covered rocks! One of the best bits about going to Cornish beaches is being able to explore all the rockpools and marine creatures which live on the rocks, and you get to see them at low tide.
The cliffs above the beach are a noted source of fossils from the Jurassic period. Fossil-hunters walk the beaches between Lyme Regis and Charmouth, but have to be wary of tides and landslips. The Dorset and East Devon Coast World Heritage Site covers 3 geological time periods; the Triassic, Jurassic and Cretaceous. These are showcased in the 3 rock types found along the coast.