Quite a sight - and it offers some of the area's most spectacular views.
Europe's highest sand dune.
Just over 60 kilometres (36 miles) from Bordeaux on the Arcachon Bay is a cool and surprising phenomenon indeed: surrounded by forests, it's Europe's highest sand dune at 110 metres (360 feet), and growing. From the top you can get an impressive view of the Mediterreanean on one side and on the other the woodlands of the Landes de Gascogne Regional Natural Park. And if you happen to be visiting in early summer, you might get to catch the Wagas Festival, a freestyle paragliding competition; concerts and other events are also held out here.