Sha Ka Ree was a location in pagan Vulcan mythology from which all of creation was said to have originated, and man's questions about life and existence could be answered. In our cultures, Sha Ka Ree was known by many other names: The Source, Heaven, the Human conception of Eden (or Paradise), the Klingon Qui'Tu, the Romulan Vorta Vor, and a name unpronounceable in the Andorian language. It was said to be located in the galactic core.
The renegade Vulcan Sybok embarked on a quest to locate Sha Ka Ree, recruiting a large number of followers via telepathic manipulation. By 2287 he was finally able to acquire control of the USS Enterprise-A using this technique. Sybok informed Captain Kirk that he had located Sha Ka Ree via visions given to him by God himself. Although Kirk initially thought Sybok to be mad, his visions seemed to be proven correct when, after successfully penetrating the Barrier, the Enterprise crew encountered a planet on the other side. However, they found out the being on the planet was not God but a malevolent alien entity that tried to trick them into freeing it from the planet. (Star Trek V: The Final Frontier)