Champagne, an idyllic landscape in the northeast of France, produces the most famous and elegant sparkling wine in the world. Old towns with magnificent Gothic churches as in Reims are a reminder of an important past. The Region Champagne-Ardenne stretches from the Belgian frontier in the north to the sources of the Seine in Burgundy in the south, and from Lorraine in the east to the Ile-de-France in the west; the main town is Chalons-en-Champagne. Champagne owes its worldwide celebrity status to the luxurious drink of the same name. Gourmets will also be familiar with Ardennes ham and typical varieties of cheese such as Langres and Chaource, all with the AC seal. The region is not one of the more popular tourist destinations, but has much to offer. Castles and fortresses in the north bear witness to the strategic significance of its borders over long periods; outstanding monuments and beautiful medieval timber-frame houses can be seen in Troyes, Reims, Charleville-Mezieres, Chalons-en-Champagne and Chaumont. The landscape guarantees variety and tranquillity: from the dense woods of the Ardennes and Argonnes through vast plateaux of cornfields and gentle chains of hills laced with vinevards, to a lake district in the south with oak woods and gently flowing rivers.