Annecy is the prefecture and largest city of the Haute-Savoie department in the Auvergne-Rhône-Alpes region of Southeastern France. It lies on the northern tip of Lake Annecy, 35 kilometres south of Geneva, Switzerland. From Wikipedia
The CG animated series transports original Hawkins heroes to the stark winter of 1985 alongside a new tinkerer named Nikki between Seasons 2 and 3