Lake Bandung was a prehistoric lake believed to exist between 126,000 and 20,000 BCE, located in and around the city of Bandung, Parahyangan highlands, West Java, Indonesia. Today, the lake had dried out and revealed the bottom of a geological basin known as the Bandung basin. It is mostly filled with habitation and industrial areas, paddy fields and orchards. It is believed that this low-lying basin has caused the southern suburbs of Bandung to suffer seasonal flooding during the rainy season, as the Citarum river that formed the lowermost backbone of the basin overwhelms and swells.