The Sangestar Tso, formerly called Shonga-tser Lake and popularly known as the Madhuri Lake, is located on the way from Tawang to Bum La Pass in Tawang district of Arunachal Pradesh, near Indo-China border above 3,708 metres (12,165 ft) above sea level.

The Taktsang Chu river that originates below the Takpo Shiri glacier to the north, flows through this region.

It flows west and then southwest to join the Nyamjang Chu river 8 miles (13 km) downstream.

The Sangesstar Tso was created by falling rocks, boulders and trees in an earthquake.

The track is very treacherous, only SUVs advisable, and that too only on clear weather day with no snowfall or rainfall.