Bhojtal, formerly known as 'Upper Lake' is the largest artificial lake in Asia situated in Bhopal. It is a major source of drinkable water for the residents of the city. Bhojtal was built by Raja Bhoj during his tenure as a king of Malwa (1005–1055). He established the city of Bhopal (also named after him, then as Bhojpal) to secure the eastern frontier of his kingdom. The lake was created by constructing an earthen dam across the Kolans River. An eleven gate dam called the Bhadbhada dam was constructed at Bhadbhada in 1965 at the southeast corner of the Lake, and now controls the outflow to the river Kaliasote. It is surrounded by Van Vihar National Park on the south, human settlements on the east and north, and agriculture fields on the west.
Bhopal is known as the city of lakes, and it is lakes that greet one on arrival. The road from the railway station crosses the Chotta Talab (Lower Lake) and if one flies in, then the drive into town skirts the Bada Talab (Great Lake) which is also known as the Upper Lake, spanning thirty-one kilometers'; more like an expanse of the sea than a lake, which while enveloping the city, reflects it as well. The Upper Lake is divided from the Lower by an over-bridge and is six sq km in area. Madhya Pradesh Tourism's Boat Club on the Upper Lake provides facilities for exciting trips by cruise, sail, paddle and motor boats.