Lac d'Issarles is a stunning volcanic crater lake located in the Ardèche region of France. The lake spans an area of approximately 138 hectares and is surrounded by lush green forests and rolling hills. It is a popular destination for fishing, swimming, and water sports, as well as hiking and biking. The crystal-clear waters of the lake are home to various species of fish, and the scenic views make it a great spot for picnicking and relaxing.