You can walk in the National Parks, follow the trail of the Cathares ( read The Holy Blood and the Holy Grail before you come ISBN 0-552-12138-X, I think that it’s a lot better than Da Vinci Code! ) and try to unravel one of Europe’s most intriguing mysteries. Search out the Via Domita (the Roman road running from Rome to Spain which is still visible in parts), or visit the Mediterranean ports of Meze, Bouzigues, Sete etc; eat seafood caught the same day in a restaurant overlooking the fishing boats, be impressed by the charm and informality of the area and enjoy yourself!
The Grottos, Aqua-land, St. Guilhem le Desert, canoeing, sea swimming, beaches, ......... etc!