🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTiếng ViệtTürkçeРусскийالعربيةفارسی한국어中文日本語EntityQ649143· pop 30· linked from 726 articlesHollow Earthhistorical concept proposing that the planet Earth is entirely hollow or contains a substantial interior spaceWikidata factsImageMap of the Interior World (1892, B&W version).pngSources (1)wikidata.orgvia Wikidata · CC0Available in 30 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةArmenianBahasa IndonesiaConnectionsPellucidarEntityNorth PoleConceptCategoriesAdventure fictionFiction about the Hollow EarthHollow EarthScience fiction themesSubterranea (geography)Thought experimentsUFO-related phenomena