Nestled at the northern foot of the Alps in southeastern France, Lac d'Annecy is a natural treasure shaped by the Ice Age. Formed 18,000 years ago, this glacial lake spans 27.59 square kilometers with a maximum depth of 82 meters. Its waters, fed by Alpine snowmelt and mountain springs, boast exceptional clarity, earning it the title of "Europe's clearest lake." The purity of the water owes much to strict environmental policies implemented in the 1960s, including upgraded sewage treatment systems and an ecological monitoring network, ensuring the lake maintains drinking-water quality year-roun
