Loktak Lake is the largest freshwater lake in Northeast India, and is famous for the phumdis (heterogeneous mass of vegetation, soil, and organic matter at various stages of decomposition) floating over it. Keibul Lamjao is the only floating national park in the world. It is located near Moirang in Manipur state, India. The etymology of Loktak is Lok = “stream” and tak = “the end”. The largest of all the phumdis covers an area of 40 km2 (15 sq mi) and is situated on the southeastern shore of the lake.

Source: https://en.wikipedia.org/wiki/Loktak_Lake