There are many attractions at the Northern part of Sumatera , also northern part of Lake Toba. Air Terjun Sepiso-piso is famous among the tourists and the locals. It's one of the most fascinating waterfall I have ever visited. When I was there, I stood and wondered where the continuous water came from. I was just so amazed by the mother nature!
Sepiso-piso waterfall is a magnificent waterfall where one must visit when they go to Medan. One can get down to the foot of the waterfall but must be very careful of the steep steps. I didn't go down as I was extremely scared.