Recursive islands and lakes

A recursive island or lake is an island or lake that is itself within an island or lake.[1]

Recursive islands

Islands in lakes
Main article: Lake island
Idjwi, in the central-southern region of Lake Kivu
RankIsland In lake CountrySize (km2) Coordinates
1[1][2]Manitoulin Island Lake Michigan–Huron Canada2,766
2René-Levasseur Island Manicouagan Reservoir Canada2,020
3Olkhon Island Lake Baikal Russia730
4Isle Royale Lake Superior United States535
5Ukerewe Island Lake Victoria Tanzania530
6St. Joseph Island Lake Michigan–Huron Canada365
7Drummond Island Lake Michigan–Huron Canada347
8Idjwi Lake Kivu Congo340
9Ometepe Lake Nicaragua Nicaragua276
Zapatera Lake Nicaragua Nicaragua
Big island Great Slave Lake Canada About 200 61°07'44.6"N 116°45'23.9"W

Islands in lakes on islands
Samosir is in the middle of Lake Toba.
RankName In lake On island CountrySize (km2) Coordinates
1[1]Samosir[note 1] Lake Toba Sumatra Indonesia 630
Gatter Island Lake Hazen Ellesmere Island Canada
Glover Island Grand Lake Newfoundland Canada 178
Volcano Island[4] Lake Taal Luzon Philippines
Motutaiko Island Lake Taupo North Island New Zealand 0.11
Mou Waho Lake Wānaka South Island New Zealand 1.2
Pomona Island Lake Manapouri South Island New Zealand
Unknown name West Lake Brownsea Island United Kingdom
Belle Isle Windermere Great Britain United Kingdom
unnamed island Senanayaka Samudra Sri Lanka Sri Lanka 7°11'59.7"N 81°31'10.2"E
Derrywarragh Island Lough Neagh Ireland United Kingdom and Republic of Ireland
Sveta Marija Veliko jezero Mljet Croatia 0.48

Islands in lakes on islands in lakes
RankNameIn lakeOn islandIn lakeCountrySize (km2)coordinatesNotes
unnamed island lake chaunoy (lac du chaunoy) René-Levasseur Island Manicouagan Reservoir Canada 0.44 51°33'20.7"N 68°50'51.5"W There exist more than 10 other islands in lake chaunoy, the largest of which is less than a tenth of the size of the one mentioned here
Treasure IslandLake MindemoyaManitoulin IslandLake Michigan–HuronCanada0.445°45′50″N 82°10′41″W
Kakawaie IslandLake KagawongManitoulin IslandLake Michigan–HuronCanada48°00′05″N 088°47′50″W
Ryan Island[5]Siskiwit LakeIsle RoyaleLake SuperiorUnited States48.0098831°N 88.7709104°W / 48.0098831; -88.7709104
unnamed islandsecond lakeDrummond IslandLake Michigan–HuronUnited States
Small Islands[6]Mackaysee LakeChambers IslandGreen Bay, Lake MichiganUnited States
unnamed islandFrith LakeKelvin IslandLake NipigonCanada49°52'28.8"N 88°40'52.8"W
unnamed islandTyllyjärviKaamassaariLake InariFinland68°54'46.3"N 27°55'16.7"E
unnamed island Lake Cancy René-Levasseur Island Manicouagan Reservoir Canada 51°33'20.7"N 68°50'51.5"W
unnamed island Lac des Pigamons Îlots Walcott Lake Mistassini Canada 51°07'17.1"N 73°21'35.6"W
unnamed island unnamed lake Wilson island Great Slave Lake Canada 61°50'06.7"N 112°46'57.1"W

Islands in lakes on islands in lakes on islands
Nameless isle within Victoria Island in Nunavut Territory in Canada.[7]
RankName In lake On islandIn lake On island Country Size (km2) Coordinates Comment
1 Small islet Not specified Not specifiedNettilling Lake Baffin Island Canada 0.04 66.687361°N 70.479923°W / 66.687361; -70.479923 There are more islands in lakes on the 'level 2' island in Nettling Lake.
2[1][8][9]Small islet Not specified Not specifiedNot specified Victoria Island Canada 0.016 69.792259°N 108.240536°W / 69.792259; -108.240536 The sometime cited name Inception Island is not an official name
3 Small islet Aek Natonang (Locally Sidihoni Lake[10]) Samosir Lake Toba Sumatra Indonesia 0.013125 2°33'52.2"N 98°52'49.4"E Two islands, the largest of which is 175m by 75m
4 Small islet Not specified Glover IslandGrand Lake Newfoundland Canada 0.01 48.796848°N 57.65785°W / 48.796848; -57.65785 There are several (at least seven) other, even smaller, islets in the lake
T-5 unnamed island Arethusa Pool Mou Waho Lake Wānaka South Island New Zealand 0.000225 44°33'15.0"S 169°05'03.4"E There are 2 islands in this lake, both less than 25m across
T-5 Small islet Not specified Eilean Sùbhainn Loch Maree Great Britain United Kingdom 0.000225 57°41'23.9"N 5°29'08.8"W Two islets, each of which is 15m by 15m
6 Small islet Not specified Not Specified Kooryet Lake Banks Island (British Columbia) Canada 53°21'07.4"N 129°59'30.4"W A number of small islets, the largest of which is only 10m across

Until 2020,[11] Vulcan Point was an island that existed in Main Crater Lake on Volcano Island in Lake Taal on Luzon in the Philippines.[12] Main Crater Lake evaporated during the 2020 Taal Volcano eruption.[11]

Recursive lakes
Lake Alaotra region, Madagascar

Lakes on islands
RankName On island CountrySize (km2)
1[1] Nettilling Lake Baffin Island Canada 5,542
Lake Alaotra Madagascar Madagascar 900
Laguna de Leche Cuba Cuba 67.2
Lough Neagh Island of Ireland Northern Ireland/United Kingdom 392
Lough Corrib Island of Ireland Republic of Ireland 176
Loch Lomond Great Britain Scotland/United Kingdom 71
Þingvallavatn Iceland Iceland 84
Lake Taupo North Island New Zealand 616
Lake Wakatipu South Island New Zealand 289
Tourists on Laguna del Volcan Maderas on Ometepe Island in Lake Nicaragua

Lakes on islands in lakes
RankNameOn islandIn lakeCountrySize (km2)coordinates
1[1]Lake ManitouManitoulin IslandLake Michigan–HuronCanada106
Shara-Nur[13]Olkhon IslandLake BaikalRussia
Siskiwit LakeIsle RoyaleLake SuperiorUnited States16.848°00′05″N 088°47′50″W
Lake Desor[14]Isle RoyaleLake SuperiorUnited States47.976825°N 88.986997°W / 47.976825; -88.986997
Lake Richie[15]Isle RoyaleLake SuperiorUnited States48.0438067°N 88.6953596°W / 48.0438067; -88.6953596
Lake MindemoyaManitoulin IslandLake Michigan–HuronCanada45.762°N 82.209°W / 45.762; -82.209
Lake KagawongManitoulin IslandLake Michigan–HuronCanada
Lake WindigoStar IslandCass Lake (Minnesota)United States0.847.418611°N 94.570278°W / 47.418611; -94.570278
fox lagoonPelee islandLake ErieCanada
Laguna del Volcan Maderas[16]OmetepeLake NicaraguaNicaragua
Laguna de Zapatera[17]ZapateraLake NicaraguaNicaragua
Antoniyevskoye LakeValaamLake LadogaRussia
Lake GeneserathBeaver IslandLake Michigan–HuronUnited States45°35'54.9"N 85°32'23.0"W

Lakes on islands in lakes on islands
RankName On island In lake On island CountrySize (km2) Coordinates
1 Unnamed Unnamed Nettilling Lake Baffin Island Canada 1.55 66.387392°N 69.644737°W / 66.387392; -69.644737
2 Unnamed Glover Island Grand Lake Newfoundland Canada 1.40 48.802486°N 57.661476°W / 48.802486; -57.661476
3 Arethusa Pool Mou Waho Lake Wānaka South Island New Zealand 0.05 ? 44.554064°S 169.083845°E / -44.554064; 169.083845

Lakes on islands in lakes on islands in lakes
Ranks Name On island In lake On island In lake Country Size (km2) Coordinates Comments
1 Unnamed Not Specified Not Specified Not Specified Lake Yathkyed Canada 0.013 62°39'04.6"N 97°47'10.2"W

Hoaxes

Moose Boulder was claimed to exist in the seasonal pond of Moose Flats on Ryan Island in Siskiwit Lake on Isle Royale in Lake Superior in the United States,[18] making it a fourth order island. In 2020, it was shown not to exist.[19]

gollark: Hello. I am ale32bit.
gollark: And back again.
gollark: And now untrapped!
gollark: Help! I am trapped in the lobby!
gollark: bloop bleep

See also

Notes
  1. Was a peninsula until 1906 when a canal was dug, separating it from the mainland.[3]

References
  1. Records, Guinness World (August 28, 2018). 2019 Guinness World Records. pp. 40–41. ISBN 978-1-912286-43-0.
  2. January 2012, Natalie Wolchover 24. "World's Largest Island-in-a-lake-on-an-island-in-a-lake-on-an-island Seen on Google Earth". livescience.com.
  3. "Samosir Island - Everything you Need to Know about Samosir Island".
  4. "Volcano Island | volcano, Philippines". Encyclopedia Britannica.
  5. "GNIS Detail - Ryan Island". geonames.usgs.gov.
  6. "Islands within Chambers Island's Lake Mackaysee Now Protected by Door County Land Trust". November 8, 2018.
  7. "Island in a Lake on an Island in a Lake on an Island". earthobservatory.nasa.gov. February 22, 2015. Retrieved March 13, 2020.
  8. "An Island in a Lake on an Island in a Lake on an Island". Atlas Obscura. Retrieved March 12, 2020.
  9. Jennings, Ken (January 24, 2012). "Ken Jennings Finds One More Thing Canada Has That No One Else Does". Condé Nast Traveler. Retrieved March 13, 2020.
  10. "Aek Natonang Lake – A Sub-Lake of Pangururan". www.toba.indonesia-tourism.com. Retrieved August 12, 2020.
  11. Freedman, Andrew; Meko, Tim; Karklis, Laris (January 17, 2020). "Taal volcano's crater lake is nearly empty". Washington Post.
  12. "Some interesting islands and lakes". Topografisch Verbond Elbruz. Archived from the original on September 19, 2013. Retrieved February 1, 2014.
  13. "Shara-Nur lake". BaikalNature Tour Operator. May 11, 1975. Retrieved March 13, 2020.
  14. "GNIS Detail - Lake Desor". geonames.usgs.gov.
  15. "GNIS Detail - Lake Richie". geonames.usgs.gov.
  16. Valenzuela, Orlando. "Puerta laguna misteriosa [Door to mysterious lagoon]". El Nuevo Diario (in Spanish).
  17. "Global Volcanism Program | Zapatera". Smithsonian Institution | Global Volcanism Program.
  18. "Largest island on the largest lake in the world". Albert Lea Tribune. July 21, 2009. Retrieved March 13, 2020.
  19. Taub, Matthew (March 10, 2020). "The Intrepid Mother and Son Who Unraveled a Geographic Hoax". Atlas Obscura.
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