The Kupli River, which flows for quite some distance as the
Assam-Meghalaya interstate border, has a unique riverbed of limestone and
soft rock for considerable length of its course. The turbulent Kupli has
thus carved for itself deep valleys and chasms all over, beside a steep,
star-shaped gorge near Garampani, where the whole Kupli falls over 60-feet
to give rise to the well-known Iale falls also known in historical legends
as 'Mahabarta'. The Khandong reservoir of the Kopili Hydro Electric
Project has now inundated Iale Falls and it cannot be seen for the better
part of the year when the reservoir is fairly full.