Iskanderkul is a turquoise glacier-fed lake in the Fann Mountains at 2,195 meters elevation, surrounded by dramatic rocky peaks. It's the most accessible of the Fann Mountain lakes — reachable by road from Dushanbe in about four to five hours — and a popular destination for day trips and weekend camping.
A small waterfall (called Alexander's Waterfall) drops into a gorge at the lake's outlet; the walk around the lake takes about three hours on good trails. Guesthouses and basic camping are available near the shore. The lake is stunning in its setting, and the drive up through the mountains is itself worth the journey.