TIDESSancti-Petri, Cadiz, Spain. On the southern tip of the Iberian Peninsula, a multitude of cultures have settled. Phoenicians, Romans, Arabs have left their marks in the salt marshes of one of the most important natural parks in Cadiz. Consisted with the duality of nature and artificiality, this terrain is a piece of land with a variable geometry due to the strength of the tides and currents.A small tuna fishing community was built ex-novo in 1946 on a small peninsula called Sancti-Petri, between the Atlantic Sea and the salt marshes of Chiclana. Nowadays, the village is in ruins and almost completely abandoned. Several Public Administrations are claiming the property, arguing over the future of this intriguing zone. The cultural and physical tides of this area will allow us to explore an architecture characterized by its variability. This architecture will be formed through the modifications of its day-to-day and season-to-season functions.The project proposed for the studio is an advanced marine research campus in the winter, which could be transformed into social and educational facilities during the summer. This cluster of buildings, among which the public or semi-public spaces hold the most importance, will explore the future capability of architecture favoring the affective links between ideas and matters.The goal of this studio is to investigate the facts and architectural devices associated to transformations. In this case the solid architecture loses its importance and the ephemerality of matters becomes the main protagonist. At the end, it\’s all about giving voice to the objects, the devices and the nature.