"Who has seen Paris and not Cassis has seen nothing." Put the words of French poet Frederic Mistral to the test on a guided tour through the pedestrian-only streets of this ancient Roman trading post. Cassis is still a lovely seaside village, with a gleaming harbor studded by white sails on a clear blue sea. Re-board your coach for an exhilarating drive up steep roads leading to Cap Canaille, one of Europe's highest sea cliffs.