With a population of over 90 million people, Vietnam is around the 13th most populous country in the world. Located on the eastern side of the Indochinese peninsula, Vietnam can be separated into four distinct regions that range from rugged mountains to fertile flatlands. The south is the economic engine of Vietnam, centering around the metropolis of Ho Chi Minh City. The south is also home to the Mekong Delta, and with it a large amount of rice production. The central highlands feature lush forest-covered hills featuring many native tribes and occasionally elephants. The Central Coast stretches along the majority of Vietnam's coastline along the South China Sea, and is home to the ancient city of Hue and many of Vietnam's nicest sea towns. The Northern region harbours some of Vietnam's most magnificent views, with the limestone karsts of Halong Bay being one of Vietnam's most notable attractions.