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A desert surrounded by water. This is an extensive coastal strip that includes the best-built system of sandbanks and mobile dunes in the Delta. A compact sand track crosses the Fangar, which you can drive or walk along until you reach the middle, the viewpoint, the lighthouse or the northern end of the peninsula. Between April 1 and August 15, it is forbidden to enter the nesting areas, which are protected by the cordons on the edge of the track. Immense sandbanks predominate in this area and what has the greatest ecological value are the dune formations, as they are among the best preserved on the Catalan coast. They constitute an important refuge for many reptiles, insects, micromammals and some amphibians. There are two types of dunes, some fixed with vegetation on top and others mobile without vegetation. You cannot walk on either of them due to their fragility. The most important fixed dune area is located on the Marquesa beach, to the right of the track that reaches the Fangar. The characteristic Fangar lighthouse stands in the middle of the dunes.