Lake Tanganyika is renowned for the economic capital of Burundi, Bujumbura, and for its gastronomy. It is the second largest in Africa and its sandy beaches border four countries, Tanzania, Burundi, DRC and Zambia. But this gem is in peril. Overfishing and pollution are destroying its ecosystem. To allow biodiversity to regenerate, Burundi and the three neighboring countries decided to close this lake to fishing for three months each year.