The Lesse is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in the Ardennes

Ardennes

The Ardennes is a region of extensive forests, rolling hills and ridges formed within the Givetian Ardennes mountain range, primarily in Belgium and Luxembourg, but stretching into France , and geologically into the Eifel...

, in the Walloon region of Belgium

Belgium

Belgium , officially the Kingdom of Belgium, is a federal state in Western Europe. It is a founding member of the European Union and hosts the EU's headquarters, and those of several other major international organisations such as NATO.Belgium is also a member of, or affiliated to, many...

. It is a right tributary to the river Meuse

Meuse River

The Maas or Meuse is a major European river, rising in France and flowing through Belgium and the Netherlands before draining into the North Sea...

.

The source of the Lesse is near Libramont-Chevigny

Libramont-Chevigny

Libramont-Chevigny is a Walloon municipality of Belgium located in the province of Luxembourg.On 1 January 2007 the municipality, which covers 177.86 km², had 9,981 inhabitants, giving a population density of 56.1 inhabitants per km²....

, in the Belgian province of Luxembourg. The Lesse flows roughly in north-western direction. Near Han-sur-Lesse

Han-sur-Lesse

Han-sur-Lesse is a village in the municipality of Rochefort, Namur Province, Belgium. It is famous for the exceptional caves carved under a nearby hill by the river Lesse, which tourists reach via a preserved remnant of the country's vicinal tramway system....

 (commune of Rochefort

Rochefort, Belgium

Rochefort is a Walloon municipality located in the Belgian province of Namur close to the Ardennes. On January 1, 2006 Rochefort had a total population of 12,038. The total area is 165.27 km² which gives a population density of 73 inhabitants per km²...

) the entire river goes underground, flowing through limestone caves. Many of the caves along the banks of the Lesse are important archaeological sites - these include the Trou de Chaleux (by the Cirque de Chaleux), and the Trou des Nutons and Trou du Frontal at Furfooz. The Lesse flows into the river Meuse

Meuse River

The Maas or Meuse is a major European river, rising in France and flowing through Belgium and the Netherlands before draining into the North Sea...

 in the village of Anseremme, commune of Dinant

Dinant

Dinant is a Walloon city and municipality located on the River Meuse in the Belgian province of Namur, Belgium. The Dinant municipality includes the old communes of Anseremme, Bouvignes-sur-Meuse, Dréhance, Falmagne, Falmignoul, Foy-Notre-Dame, Furfooz, Lisogne, Sorinnes, and Thynes.-Origins to...

. Towns along the Lesse are Daverdisse

Daverdisse

Daverdisse is a Walloon municipality of Belgium located in the province of Luxembourg.On 1 January 2007 the municipality, which covers 56.4 km², had 1,372 inhabitants, giving a population density of 24.3 inhabitants per km².-External links:**...

, Han-sur-Lesse

Han-sur-Lesse

Han-sur-Lesse is a village in the municipality of Rochefort, Namur Province, Belgium. It is famous for the exceptional caves carved under a nearby hill by the river Lesse, which tourists reach via a preserved remnant of the country's vicinal tramway system....

, Houyet

Houyet

Houyet is a Walloon municipality located in the Belgian province of Namur. On 1 January 2006 the municipality had 4,485 inhabitants. The total area is 122.31 km², giving a population density of 37 inhabitants per km²....

and Anseremme.