Ba Be is the largest natural lake in Vietnam. It is located in Nam Mau Commune, Bac Kan District, Bac Kan Province in the northeast region of the country.

Having been formed approximately 200 million years ago, the lake is surrounded by limestone cliffs, which in turn are covered by primary forests.

The lake is comprised of three zones named Pe Lam, Pe Lu, and Pe Leng. Three rivers, Nang, Ta Han, and Nam Cuong, are the main tributaries to the lake.

The Nang River enters the lake through a large waterfall called Dau Dang. In the lake there are also three islands, named An Ma, Khau Cim, and Po Gia Mai (literally "Widow's Island").

Other lakes in the MSN list are: Crater Lake, Oregon (USA), Moraine Lake (Canada), Manapouri (New Zealand), Tahoe (USA), Lucerne (Switzerland), Bled (Slovenia), Lago de Patzcuaro (Mexico), Coniston Water (England), General Carrera (Argentina and Chile), Chilko (Canada), Chelan (USA), Siljan (Sweden), George (USA), Iliamna (USA), and Issyk-Kul (Kyrgyzstan).