Cao Lãnh (help=no) is the capital city of Dong Thap province, Vietnam. It is located at around . Prior to 1975, Cao Lanh was the capital of the Kien Phong province, in the Mekong Delta region of South Vietnam. In February 1976, Kien Phong was merged with Sa Dec province to become Dong Thap province (...) (from Wikipedia)