Eden

Eden was a planet sought by the mad Doctor Sevrin and his group of young followers. They believed the planet lay in the Romulan Neutral Zone and forced the to go there. The planet they find, however, though it is a lush paradise, proves to be teeming with plant life containing deadly, highly corrosive acid. Eden was also the human name given for the mythical planet Sha Ka Ree which lay at the center of the galaxy.(, TOS Movie: Star Trek V: The Final Frontier)