<P> Isla Nublar is a fictional Central American island in the Jurassic Park franchise, first depicted in Michael Crichton's 1990 novel of the same name . It is the primary setting of the 1993 film Jurassic Park and of Jurassic World (2015). Both the novel and film versions of the Jurassic Park theme park are located on Isla Nublar off the west coast of Costa Rica, which has leased the island to John Hammond, the CEO of bio-engineering firm InGen . </P> <P> In Michael Crichton's original novel, Isla Nublar is a relatively small island approximately 40 minutes by helicopter from the capital of Costa Rica, San José . John Hammond gives its proportions as "...8 miles long and 3 miles wide at the widest point, in total some 22 square miles ." It is not a true island, but a volcanically active seamount, or underwater island thrust up past the surface of the sea . Along the south side of the island are natural steam vents indicating the continuing volcanic activity . The volcanic activity enables a geothermal power plant to be built in the northern mountains . </P>

What is the island called in jurassic park