Lost World
Lost World may refer to:

Doyle novel and adaptations
The Lost World (Doyle novel), a 1912 book
The Lost World (1925 film), a silent film set in South America
The Lost World (1960 film), set in Venezuela
The Lost World (1992 film), set in Africa
The Lost World (1998 film), set in Mongolia
The Lost World (2001 film), a BBC film
The Lost World (TV series) (Sir Arthur Conan Doyle's The Lost World), a television series
"The Lost World", a radio drama in the Radio Tales series

Crichton novel and adaptations
The Lost World (Crichton novel), a 1995 book
The Lost World: Jurassic Park, a 1997 film
The Lost World: Jurassic Park (film score)
The Lost World: Jurassic Park (arcade game)
The Lost World: Jurassic Park (console game)
The Lost World: Jurassic Park (handheld game)
The Lost World: Jurassic Park (Sega game)
The Lost World: Jurassic Park (pinball)
Chaos Island: The Lost World, a video game

Other media and entertainment
Literature
Lost Worlds (Carter short story collection), a short story collection by Lin Carter
Lost Worlds (gamebook), by Alfred Leonardi
Lost world, a speculative fiction subgenre
Lost World (manga),  by Osamu Tezuka
Lost Worlds (Smith short story collection), a short story collection by Clark Ashton Smith
The Lost World, a poetry collection by Randall Jarrell

Games
Forgotten Worlds (known as Lost Worlds in Japan), a 1988 arcade game
The Lost World, a 1998 role-playing game for MSX2
The History Channel: Lost Worlds, a 2008 Macintosh game
Ricochet Lost Worlds, video game
Sonic Lost World, a 2013 video game in the Sonic the Hedgehog franchise
Lost World (pinball), a pinball machine

Music
The Lost World (album), by Pull Tiger Tail

Film and television
Lost Worlds (TV series), a History Channel documentary series
Il mondo perduto (The lost world). a compilation of short documentary films by Vittoria De Seta

Places
Lost World Caverns, West Virginia
Lost World, a relict tropical rainforest on Cape Melville with unique fauna

See also
Lost lands
Lost city
Mythical place
Mythical continents