世界上最深的湖是贝加尔湖，位于俄罗斯西伯利亚地区。贝加尔湖是世界上最古老、最深、最干净的淡水湖之一，其深度达到了1642米，含有20%的世界淡水储量。

贝加尔湖的周围有一条长约2000公里的岸线，湖面面积达到了31500平方公里。贝加尔湖水质清澈，生态环境保护得非常好，湖中生物种类繁多，包括独特的贝加尔湖尼斯湖鲤、贝加尔湖鳟鱼等。

贝加尔湖的深度和水质是其最大的特点，它拥有着独特的自然风光和生态环境，在世界范围内享有很高的声誉。

The world's deepest lake is Lake Baikal, located in Siberia, Russia. Lake Baikal is one of the oldest, deepest, and cleanest freshwater lakes in the world, with a depth of 1,642 meters and containing 20% of the world's freshwater reserves.

Lake Baikal has a shoreline of about 2,000 kilometers and a surface area of 31,500 square kilometers. The water quality of Lake Baikal is clear, and the ecological environment is well protected. There are many different species of organisms in the lake, including unique Baikal omul and Baikal trout.

The depth and water quality of Lake Baikal are its greatest features, and it has a unique natural landscape and ecological environment, enjoying a high reputation worldwide.