The largest freshwater lake in Uvs, Achit lake is on the border of Uvs and Bayan-Olgii aimags, and is an easy detour be-tween Ulaangom and Olgii. It offers stunning sunsets and sunrises and good fishing. At an elevation of 1,435 m above sea level it covers an area of 290 km². It is 28 km long, 16 km wide, and 10 m deep. The coast is covered with steppes, mostly hilly but swampy on the northwest and northeast. Several rivers flow into the lake.

The lake is home to flocks of geese, eagles and other birdlife. One definite draw-back is the absolute plethora of mosquitoes during the summer.