In Steven Spielberg’s The Lost World: Jurassic Park, the expedition visits Isla Sorna.
Isla Sorna is the fictional island where InGen bred and raised dinosaurs before transporting them elsewhere. The movie’s characters call it “Site B,” distinguishing it from Isla Nublar, the island that housed the Jurassic Park visitor facility in the first film.
Ian Malcolm leads a research team to document the animals in their natural environment. A second group arrives with plans to capture dinosaurs and display them in San Diego, turning the scientific expedition into a corporate exploitation scheme. The island’s abandoned facilities reveal part of InGen’s history without recreating the original park.
The most common mix-up is Isla Nublar. Isla Nublar is the setting of much of Jurassic Park, while Isla Sorna is the principal island setting of The Lost World: Jurassic Park and also appears in Jurassic Park III.