Vorta Vor was an ancient Vulcan / Romulan mythic concept of paradise, akin to Eden or Heaven. (TOS movie: Star Trek V: The Final Frontier)

The ancient Vulcans believed that Vorta Vor, the Wellspring of Creation, was the home of the Ancient Ones known as the Vhorani and that this race was responsible for the creation of the Vulcan civilization. (Last Unicorn RPG module: The Way of Kolinahr: The Vulcans)

The origin of Vorta Vor on Vulcan were stated in ancient myths that spoke of a paradise that lay within the heart of the Womb of Fire. Here, the water was always sweet and the lands a paradise compared to the harsh deserts of the Vulcan homeworld. (TOS novel: Vulcan's Soul Exiles) In latter eras, the Romulans used speeches during the funerals of fallen soldiers who were called heroes that were welcomed back to Vorta Vor where they served as honor guards for as long as the stars shined in the firmament. (TNG novel: The Genesis Wave, Book 3)

Prior to 2374, Quark had sold fake maps that apparantly showed the location of Vorta Vor. (DS9 novel: The Fall of Terok Nor)