Nongkhnum  river Island:-A couple of hours trek from Nongstoin is the hitherto little-known river island on the Kynshi known  as  Nongkhnum. It is in the form of a Plateau with an area of about 25 Sq.kms. The island is form due to the divergence  of the river Kynshi  near Diangsyiang and Diligim villages, forming the northern stream called Namliang and the southern stream called Phanliang. The island in endowed with beautiful perennial falls namely Weinia fall in the northern side, Kshaid Thum fall in the southern side and Langshiang  fall on the western side. One would wonder the hidden beauty of this river island which  the Gods have bestowed on nature, and worthily, describable as an Isle of  Water falls.