Penarth on Cardiff Bay, a delightful seaside town with many elegant Victorian buildings, and in the opinion of my wife, the best pier in Britain.  She should know as she has visited all 50 (odd) of them.  The cliffs are dramatically stratified, with brightly coloured beds from the Triassic (Mercia Mudstone) and early Jurassic periods–many fossils to be found. All along this coast, particularly at Barry Island the layers are unbelievably visible and accessible, tho’ at Penarth one often sees minor and not so minor rock falls, so care needed. Here are a few pictures and a link to find out more.