Nanak Sagar is an artificial lake created by a dam built on the Deoha river. It is located in Nanakmatta, one of the religious places of the Sikhs. Nanakmatta is the seat of one of the most important Sikh shrines, Gurudwara Sri Nanakmatta Sahib, which is closely associated with Guru Nanak. The vast Nanak Lake mirrors a plethora of hues of the changing sky. The lake is home to hundreds of avifauna, including the migratory kind. Birders can have an excellent time here.