Close to the Pays-Basque, Biarritz is famous for its coast and the rocks in the sea. From Biarritz to northern Spain, you can hear the Basque language, which is quite unlike any other known language. In this part of the sea, there are large quantities of seaweed, which is known to have beneficial effects on the body. This has encouraged the medical use of seawater in Biarritz, also known as thalassotherapy. In Biarritz, you will find the second oldest golf course of the world, and the Museum of the Sea will show you all kinds of interesting sea animals. The annual Biarritz Surf Festival is one of the premier surf events in Europe.