Lake Sidihoni is a

lake A lake is an area filled with water, localized in a basin, surrounded by land, and distinct from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, although, like the much large ...

located within

Samosir Samosir, or Samosir Island, is a large volcanic island in Lake Toba, located in the north of the island of Sumatra in Indonesia. Administratively, Samosir Island is governed as six of the nine districts within Samosir Regency. The lake and i ...

Island which itself is an island within

Lake Toba Lake Toba ( id, Danau Toba) ( Toba Batak: ᯖᯀᯬ ᯖᯬᯅ; romanized: ''Tao Toba'') is a large natural lake in North Sumatra, Indonesia, occupying the caldera of a supervolcano. The lake is located in the middle of the northern part of the i ...

, in North Sumatra,

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...

and is therefore notable for being a "lake on an island in a lake on an island". It is approximately 11–12 km to the east of hot spring pools at

Pangururan Pangururan is a town and a district of the same name in North Sumatra province of Indonesia and it is the seat (capital) of Samosir Regency, and the largest town on Samosir Island. Its population at the 2020 Census was 34,209.Badan Pusat Statistik ...

References

{{reflist Sidihoni Landforms of North Sumatra Lake Toba