The Arcachon basin is a small inland sea of 155 km² at high tide and 40 km² at low tide. The basin is triangular in shape, delimited by more than 80 km of flat coasts or wooded dunes. Unlike the great Landes lakes, it is fed by a river, "La Leyre", and is largely open to the Bay of Biscay, the tide thus bringing in considerable bodies of water twice a day.
The opening onto the Atlantic Ocean is through a single access, the "passes", located between the dune of Pyla and the tip of Cap Ferret.
It is a set of channels allowing the circulation of water between the basin and the ocean. Movable sandbanks carried by sea currents constantly modify its course.
The strength of the currents makes it difficult to cross these passes, especially on a day with a high tidal coefficient.
Biganos, on the other hand, is a town of 10,000 inhabitants, part of the Landes de Gascogne Regional Park, of which it is the largest center of forestry.
With its two traditional ports and its river, "La Leyre", Biganos is a special site where green tourism and seaside influence from nearby towns such as Arcachon and Andernos is mixed. La Leyre with its prehistoric ferns and its exuberant nature, the island of Malprat with its reeds and cotton trees have given the nickname "little Amazon" to this corner.
Canoeing, bike rides, fishing, horseback riding and hiking will be complementary allies to the joys of the beaches of the Arcachon basin and the ocean coast.
In addition, close to the first wine estates and less than an hour from Bordeaux, Biganos is an ideal place to discover in more depth the cultural and architectural heritage of Gironde.