Tannforsen is a waterfall located in the province of Jämtland, Sweden, near the border with Norway. It is one of the largest waterfalls in Sweden, with a height of approximately 38 meters (125 feet) and a width of about 60 meters (197 feet). The water comes from the river Indalsälven, which is one of the largest rivers in Sweden.

The area around Tannforsen is a popular tourist destination for both locals and visitors from other countries. There are several hiking trails in the surrounding area that lead to the waterfall, and there is also a parking lot nearby for those who prefer to drive. The waterfall is most impressive during the spring and early summer months, when the snow is melting and the water flow is at its highest.

In addition to the natural beauty of the waterfall itself, there are also several other attractions in the area. The nearby town of Åre is a popular ski resort during the winter months, and there are several historic churches and other buildings in the area that date back to the Middle Ages. Overall, Tannforsen is a must-see destination for anyone who loves nature and outdoor activities.