Simalungun Regency is a regency in North Sumatra. Its seat is Raya. The regency covers an area of 4,386.6 square kilometres, and at the 2010 census it had a population of 818,104. The regent of Simalungun is JR Saragih. He was elected as regent of Simalungun on Pilkada 2015.
Local people mention it as Bukit Kapur Tinggi Raja, but some people also called it as Kawah Putih (White Crater) same name as Kawah Putih in West Java. The crater is located in Dolok Tinggi Raja Village, 90 kilometers from Medan or 3 to 4 hours drive by motorcycles with route Medan-Lubuk Pakam-Galang-Bangun Purba-Dolok Tinggi Raja. Many people come in Sunday and holidays, so for the best to take photo, weekdays are more convenient.
Parapat is small nice village located on edge of the Lake Toba. This place is known for relaxing and tourism. There are some good hotel to stay and there are also available ferries service to Samosir Island.