//
Photo: Yorick (http://www.tertiumdatur.blogspot.com), Public domain via Wikimedia Commons
Highest waterfall in North Sumatra. You can climb down to get near to the waterfall or just enjoy the vista from top.
The Sipiso-piso is a plunge waterfall in the Batak highlands of Sumatra, Indonesia. It is formed by a small underground river of the Karo plateau that falls from a cave in the side of caldera of Lake Toba, some 120 metres (390 ft) down to lake level. Sipiso-piso is a well-known tourist attraction and a nearby vantage point offers views of the falls and lake. There are 651 steps between the bottom of the waterfall and the main entrance.
© OpenStreetMap contributors
Bukit Gajah Bobok
A hill overlooking the view of northern side of Lake Toba. You need to climb a bit to reach the top hill, of which you can see even Sinabung & Sibayak volcanoes on a very clear day.
Gunung Sibuatan
Highest mountain in North Sumatra with a height of 2457 m. Located in northern part of Lake Toba, the mountain is covered in thick rainforest. A guide is needed and the climb is hard. Not very popular with climbers. Usual climb will take 2 days.
Tugu Makam Raja Silahisabungan
A grave of Batak King Silalahi, contains well-preserved Batak traditional house.