Tófufoss is a small but very nice waterfall along road 933 (Fljótsdalsvegur) at the west side of lake Lagarfljót (almost at then end) in the east of Iceland.
From Egilsstaðir drive north to Fellabær and there take the exit to Fljótsdalur (road 931). After the parking for Hengifoss take road 933. After the exit to road 910 Tófufoss is located at the right side of the road. After the bridge there is a pocket in the road where you can park your car (gps 65.049341, -14.932206).
It only take a few minutes to walk to Tófufoss.