The largest spits are Hel Peninsula and the Vistula Spit. The coast line is varied also by Szczecin and Vistula Lagoons and several lakes, including Jamno. The largest Polish Baltic island is Wolin, located within Wolin National Park. The largest sea harbours are Szczecin, Świnoujście, Gdańsk, Gdynia, Police and Kołobrzeg and the main coastal resorts – Świnoujście, Międzydzdroje, Kołobrzeg, Łeba, Sopot, Władysławowo and the Hel Peninsula.