Sivasagar Tank, also known as Borpukhuri, is a historic artificial lake located at the heart of Sivasagar town in Assam, approximately 360 km east of Guwahati and just 1 km from the iconic Sivasagar Sivadol complex. Built in the 18th century by the Ahom rulers, this massive water tank covers around 257 acres and is famous for maintaining a constant water level throughout the year. Surrounded by important landmarks such as Sivadol, Vishnudol, Devidol, and colonial-era structures, the tank serves as a peaceful recreational spot for visitors. Its central location along Station Road and Temple Road makes it easily accessible from the nearby Sivasagar bus stand and railway station. With its serene atmosphere, historical significance, and scenic walking areas, Sivasagar Tank is one of the most important heritage attractions in Assam and a must-visit for history lovers and photographers.