Batam (also called Batam City) is an industrial city in the province of Riau Islands, Indonesia. Over 1 million people live in it. It is the biggest city in Riau Islands, and the third biggest city in Sumatra. It is part of the Indonesia-Malaysia-Thailand and Indonesia-Malaysia-Singapore free-trade zone.
The city administrative covers an area of 3 big islands with some small islands surround them. The 3 big islands are Batam, Rempang, and Galang. The islands are conected by bridges called Barelang Bridges (Indonesian: Jembatan Barelang) that is a short name for Batam-Rempang-Galang Bridges.