Among the many lakes in the district, the Tannur lake which was also called the Moti Talab, in the Pandavapura Taluk, is an old lake with historical association. It is situated about 3 miles to the left of the seventh mile of the Pandavapura Railway Station- Nelligere Road. Being located on a hilltop, one can enjoy a panoramic view of the valley below and other hills in the area. A climb up the hillock next to the lake can also be a wonderful experience. This tank has been constructed by putting up an earthen bund across the gap between two rocky hills. The bund of this tank is said to have been constructed in the Hoysala days (12th century) by Sri Ramanujacharya who named it as Tirumalasagara. Well pleased by the clear water of the lake, Nasir Jung, son of the then Subedar of the Deccan, gave it the name of Moti Talab(lake of pearls) in 1746. The bund was later repaired by Tipu Sultan.