On the banks of river Sutlej at Tattapani, some 60KM from Shimla. You can see the sand and rock deposits on the banks. Tattapani is known for hot sulpher water springs. I must say that is is really hot.
As you descent from Shimla at 2200m to Tattapani at 650M you get a sense of a roller coaster ride with gorges on either side. It took almost 3 hours to reach there. Long away and down the valley you will start seeing a river. I didnt have any idea that that was the place we were supposed to reach. Actually no idea of the altitude difference between both the places. So Tattapani is almost hot and humid as Delhi is and where as Shimla was mild cold.
We were rewarded with beautiful gorge and hot water springs there. This is a religious spot. People come and take social dips in the months of January-February. Sutlej is the longest river of the 5 rivers in the Greater Punjab. Sutlej merges with Beas first and later with Indus before draining down to Arabian sea near Karachi in Pakistan.