加冷河
The Kallang River is the main waterway that meanders through Kallang. The source of the Kallang River is the Lower Peirce Reservoir (formerly known as the "Kallang River Reservoir"; renamed in honour of Municipal Engineer Robert Peirce in 1922) and the river mouth is located at Kallang Basin, near to the Merdeka Bridge. Flowing for more than 10 kilometres, the Kallang River is the longest river in Singapore and drains areas as far north as Bishan and Ang Mo Kio.