visiting this place during February, during bycle touring at North sumatra. that time there was erruption of volcano Sibayak.
Lake Toba was a old volcano lake, and in the middle of it contains island called Samosir, an is a Batak area, with most 95% of population was christian. main town at Samosir was: Tuktuk, Ambaritha, Tomok. these three town located at north part of the island, and there were others like Onna Runggo( super scenic view, but the road to there was in really bad condition.) etc.
To see the good view of Lake Toba, i suggest that one can go to Menara Tele, located 21 km out of the creator, after Pangururan, can see the lake from other edge. or else when you are on the way from Medan to Parapat, via Sumatra Highway( super narrow and hilly route), can take picture but it is imposibble to stop the vehicle, unless you go with bycle.
How to go:
1. By bus, public transport~ take Damri bus from Kualanamo to AMPLUS terminal, take yellow bus nomber 64, 63. than from Amplus take public bus to Parapat, 30.000 idr. from parapat, take ferry to Tuk-tuk( passenger) 10.000, first ferry 8am, last 7pm.
2. Take chater van if you are in group. many agent at Kualanamo airport.
3. Ferry to Samosir: from Parapat, "Tiga-Raja" jetty , take ferry to Tuk-tuk, it is for passenger. if you are driving , take ferry to Tomok.
4. By bycle ( still must take ferry from parapat to samosir), from Medan( not really recommended becaose the traffic is busy and if yes you will go through Tebing Tinggi and Permatang siantar than Parapat) , or what i did is from Tanjung Balai ( port at Asahan area at north sumatra) than take the village route to Prapajanji, to Mandoge and finally reach Parapat. super scenic view and good ride.
** Strong recommend to visit Menara Tele, to see the scenic view along the route and also lake Toba.