What is the island on which King Kong was found?

Skull Island is the name most often used to describe a fictional island first appearing in the 1933 film King Kong and later appearing in its sequels, the three remakes, and any other King Kong-based media. It is the home of the eponymous King Kong and several other species of creatures, mostly prehistoric and in some cases species that should have been extinct long before the rise of mammalian creatures, along with a primitive society of humans.

In King Kong (1933), the island is never mentioned by name and is located at approximately 12°S 78°E — somewhere off the coast of Sumatra, Indonesia. There is a distinctive rocky knoll in the center of the island which is shaped like a human skull, which is referred to as "Skull Mountain". It wasn't until the Son of Kong is the referred to as Skull Island.