Lake Undun
| Undun | |
|---|---|
| Danau Undun (Indonesian) | |
| Location | Landu Leko District, Indonesia |
| Coordinates | 10°30′56″S 123°22′1″E / 10.51556°S 123.36694°E |
| Basin countries | Indonesia |
| Surface area | 6,388 ha (15,790 acres) |
Undun (Indonesian: Danau Undun) is a lake on the Indonesian island of Roti in the province of East Nusa Tenggara, in the Lesser Sunda Islands.