Lake Pavin is a volcanic lake located in the Auvergne region of central France. It was formed about 6,000 years ago after a volcanic eruption created a caldera that filled with water. The lake is known for its deep blue color and is surrounded by lush forests, making it a picturesque natural site. The lake is approximately 1.5 kilometers long and 0.5 kilometers wide, with a maximum depth of around 92 meters. It is also home to various species of fish and is a popular spot for fishing and hiking. The unique geological features of Lake Pavin attract both tourists and researchers interested in volcanic activity.