The ancient method of salt-making, learnt ages ago by the Piran salt-workers from their teachers, the salters from Pag Island, is still something special, even in the entire Mediterranean. Not only that the traditional manual gathering of salt in salt fields is a special feature of the cultural heritage of the Mediterranean Slovenia, but it also provides for conditions that enable conservation of the most significant natural heritage of the Sečovlje Salina. According to the available written records, the Sečovlje salt-pans are more than 700 years old, and even much older according to some other sources. Once upon a time, salt-pans were quite common along the mouths of the rivers in the Gulf of Trieste and Istria.