"Lost Worlds" refers to fictional or real places that have been forgotten or remain undiscovered, often depicted in literature, film, and exploration. These settings typically feature unique ecosystems, ancient civilizations, or mythical creatures, capturing the imagination of adventurers and storytellers alike. Examples include the Lost City of Atlantis and Shangri-La. In literature, "Lost Worlds" often serve as a backdrop for adventure and discovery, highlighting themes of exploration and the unknown. Notable works include Arthur Conan Doyle's "The Lost World," which introduces readers to a prehistoric jungle inhabited by dinosaurs. Such narratives encourage curiosity about our planet's hidden wonders.