This low-oblique photograph shows the lower Mekong River and its vast delta. Rising on the Plateau of Tibet, the Mekong flows generally southeast for 4,160 km (2,600 mi) and empties into the South China Sea through the large delta. The vast, swampy delta, crisscrossed by many channels and canals, is one of the greatest rice-growing regions of Asia. Barely discernible northeast of the delta is Ho Chi Minh City, formerly Saigon. Point Cau Mau, the southern tip of Vietnam, is visible southeast of the delta. Image courtesy of NASA.