In addition to places in Paro, Thimpu and Punakha, another fascinating destination is the sacred valley of Bumthang. This picturesque drive to Bumthang takes you through regions profuse in flora and fauna and several magnificent mountain passes and places of great historical importance. Duer Hot Spring trail follows the Chamkhar Chhu and forest of Spruce hemlock cypress juniper and maple. On the way, the surrounding mountains can be viewed. Tsachu is Hot Spring So you have to relax in the hot spring after the tiring trek.