Isla Sorna, alias Site B, is one island of the group The Five Deaths. "Isla Sorna" roughly means "Sarcasm Island" in Spanish. The research station of InGen, where the dinosaurs were created, was located on this island. It is the place where most of the movies, books and games about Jurassic Park take place. The island is much larger than Isla Nublar.
Different versions of Isla Sorna exist in the different Jurassic Park canons: