Given the question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Allondon - The Allondon is a river which flows for some 22 kilometres (14 mi) between France and Switzerland in the Rhone Alps area. Its source is located in the commune of Echenevex in the Ain department and ends in the river Rhone at the village of Russin in the canton of Geneva of Switzerland. It is home to the only recently known population of the rare insect Lachesilla rossica.
The answer is:
Natural Place