Keenjher Lake or Kalri Lake is located 22 kilometers away from Thatta and about 122 kilometers from Karachi and 80 Kilometers from Hyderabad. It is one of the largest man made lake in Pakistan.

Keenjher lake was build possibly in the 12th century by the local rulers as a water reservoir for the then capital of Sindh Thatta.

Today Keenjher lake is an extremely beautiful blue water lake which It plays an important ecological role in the functioning of the Indus River basin. It is extremely important for a wide variety of breeding, passage and wintering waterbirds. The mid-winter waterbird counts of the late 1980s averaged 140,000 birds per winter.