Interstellar starship used by a long-lived being known to the ancient peoples
of Earth's South American continent as Kukulkan. In 2270, the
U.S.S. Enterprise encountered
Kukulkan's ship and made contact with the legendary being. Either Kukulkan or his ship
had the ability to generate a force globe around other vessels. Kukulkan's ship also had the
interesting capability of generating a translucent image of the huge colorful winged
serpent, Quetzalcoatl, over the shape of its hull. ("How Sharper Than A Serpent's Tooth").
It was not made clear in the episode, but the entire ship was probably controlled by Kukulkan alone, without crew.