One of the best ways to visit Cadaqués and learn about its history is to wander around the Old Town and winding cobbled streets. Medieval town used to be walled-in and was located where the Old Town is today. Only the remains of the ancient bastion of the wall have been preserved up to today and it is part of the Town Hall. The ancient pavement, known as rastell was handmade using slate stones, can be appreciated when walking through the Old Town. Rastell has been best preserved in El Call Street. The slate stones, placed in a vertical position, were arranged following the herringbone pattern so as to absorb the excess of water and to prevent people from slipping.