Porto Covo
Porto Covo is one of the two civil parishes in the municipality of Sines, located along the western Alentejo coast of Portugal, about 170 km south of Lisbon. Known for its beaches and ties to the ocean, the name Porto Covo likely translates as port of the covos, the term covo referring to a fishing net.
The earliest record of human settlement in the area of Porto Covo dates to the Carthaginian trading along the coast. By the time of the conquest of Hispania by Rome, the island of Pessegueiro hosted a small fish processing centre (from archaeological excavation of salt tanks linked to this industry).
The parish of Porto Covo, by the middle of the 18th century, was nothing more than a small coastal settlement around a beach and small cove. Its small dimensions were reflected in the number of homes, which numbered only four by 1780. On the island of Pessegueiro, King Phillip II of Spain hoped to found a maritime port to support his claim to the territory and defend against marauding pirates. At that time an artificial rock barrier was constructed to connect the island of Pessegueiro to the coastline.
Source: en.wikipedia.org/wiki/Porto_Covo 07.03.2012
Breakers with Porto Covo
Even it is physically explicable, it is fascinating again and again, how the water can change drastically its colour and transparency from one moment to the next.