Bau Tro is a lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 in Dong Hoi

Dong Hoi

Đồng Hới is the capital city of Quang Binh province, in the north central coast of Vietnam. The city’s area is , population as per the 2009 census: 108,526. Urban area is 55.47 km², urban population was 71,620; Suburban area is 100.24 square kilometers, suburban population was 36,906...

 city, Quang Binh Province

Quang Binh Province

Quảng Bình , formerly Tiên Bình under the reign of Le Trung Hung of the Lê Dynasty, this province was renamed Quảng Bình in 1604) is a province in the North Central Coast of Vietnam....

, Vietnam

Vietnam

Vietnam – sometimes spelled Viet Nam , officially the Socialist Republic of Vietnam – is the easternmost country on the Indochina Peninsula in Southeast Asia. It is bordered by China to the north, Laos to the northwest, Cambodia to the southwest, and the South China Sea –...

. This lake is an important fresh water supply for more than 130,000 inhabitants of Dong Hoi City. But Bau Tro is more known for archaeological findings by French archaeologists during French Indochina

French Indochina

French Indochina was part of the French colonial empire in southeast Asia. A federation of the three Vietnamese regions, Tonkin , Annam , and Cochinchina , as well as Cambodia, was formed in 1887....

periods. The artefacts found here dated back as far as 5,000 years ago, displaying important proof of human settlements in this area.