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The southernmost region of Portugal’s mainland, Algarve is one of Europe’s top tourist destinations. Almost 10 million people visit Algarve annually. In summers, the population of the region swells to three times its original size. Algarve has an area of roughly 5000 square kilometers and a population of more than 400,000. Its booming tourist industry has made it one of the richest regions of Portugal. The region also has some islands and islets. These islets are rocky protrusions, jutting out of sea. These outcrops are excellent diving locations with amazing marine life and underwater terrain. Algarve is also home to the series of barrier islands, Ria Formosa Lagoon. The area is a natural park and abode to several bird species and also a site of sea food farming. The coast of Algarve is freakishly beautiful with a series of limestone caves. There are also several wrecks in the area which have facilitated artificial reef growth. The water temperatures here stays between 14-23 degrees Celsius, which means diving throughout the year is possible. The visibilities are also generally very good for diving. The diving sites of Algarve are one of the best in Europe and are known for their biodiversity and cleanliness.