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Dhiraj Sharma

Founder and Head Editor

Dhiraj founded Finepedia to share fascinating, obscure, and bizarre facts in a single place. Finepedia provides curated information on various topics with proper citations and references.

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Finepedia underwater caves

Infographic of giant sinkholes and blue holes, showing a round blue hole in a reef with callouts for Taam Ja', the Great Blue Hole, Xiaozhai Tiankeng, Sima Humboldt and Guatemala City

Geography and Places / General Knowledge / Facts List / Top 10 Facts / Environment / Natural Wonders

Oct 19, 2026

Giant Sinkholes and Blue Holes: Top 10

Giant sinkholes and blue holes are places where the ground or seabed collapsed into deep pits, from ocean shafts hundreds of metres deep to city stree…