Complex sentence: The piers at Seaview, Shanklin, Ventnor and Alum Bay were all destroyed by various storms during the 20th century; only the railway pier at Ryde and the piers at Sandown, Totland Bay (currently closed to the public) and Yarmouth survive.
Split into simpler sentences: The piers at Seaview, Shanklin, Ventnor and Alum Bay were all destroyed by various storms during the 20th century. Today only the railway pier at Ryde and the piers at Sandown, Totland Bay (currently closed to the public) and Yarmouth survive.