Tigrovaya Balka is a wetlands and forest nature preserve on the lower Vakhsh River, right before the Afghan border. A permit is required to visit. Full information for the prospective tourist coming in 2016. For now, please view the wonderful photos on the official website, three of which are below:

Tigrovaya Balka trees

Tigrovaya Balka wetlands

Tigrovaya Balka forest

Looking west towards the mountains

This is the satellite view of the nature preserve, in dark green at the centre (click to enlarge):

If you can read Russian, you can read this interesting article, which includes photos on the preserve.

Check back by mid-2016 for a full update of this page.