Malaysia is a country in Southeast Asia, located partly on a peninsula of the Asian mainland and partly on the northern third of the island of Borneo. West (peninsular) Malaysia shares a border with Thailand, is connected by a causeway and a bridge (the 'second link') to the island state of Singapore, and has coastlines on the South China Sea and the Straits of Malacca. East Malaysia (Borneo) shares borders with Brunei and Indonesia.