the concrete structure, together with ilha da pescaria and the adjacent cape, make wall-like structures on each extreme of the beach, protecting it from the elements and giving it a very particular charm. 

from here one can clearly see the rocky island.  a short distance to the south, ilha do tatu (tatu's island) adds a dimension to the local landscape    

an important entry point for products arriving from across the world during the colonial era, sepetiba was at a time defended by three fortifications, which also covered the islands on each side of the beach.