Waterways define the geography, economy, and culture of the Bishnupur region.
* **Loktak Lake**: Though the lake itself stretches across the broader district, it dictates the lifestyle of the entire area. It is the largest freshwater lake in Northeast India, famous for its floating islands of vegetation (*phumdis*). * **Nambul River**: One of the key waterways traversing the valley region that eventually drains into the vast Loktak lake system, heavily influencing local agriculture.