The Atlanteans had "seed life-force" powered levitating cars

 "Thus the Atlanteans could control what one calls the life force. As today one extracts the energy of heat from coal and transforms it into motive power for our means of locomotion, the Atlanteans knew how to put the germinal energy of organisms into the service of their technology. One can form an idea of this from the following. Think of a kernel of seed-grain. In this an energy lies dormant. This energy causes the stalk to sprout from the kernel. Nature can awaken this energy which reposes in the seed. Modern man cannot do it at will. He must bury the seed in the ground and leave the awakening to the forces of nature. The Atlantean could do something else. He knew how one can change the energy of a pile of grain into technical power, just as modern man can change the heat energy of a pile of coal into such power. Plants were cultivated in the Atlantean period not merely for use as foodstuffs but also in order to make the energies dormant in them available to commerce and industry. Just as we have mechanisms for transforming the energy dormant in coal into energy of motion in our locomotives, so the Atlanteans had mechanisms in which they — so to speak — burned plant seeds, and in which the life force was transformed into technically utilizable power. The vehicles of the Atlanteans, which floated a short distance above the ground travelled at a height lower than that of the mountain ranges of the Atlantean period, and they had steering mechanisms by the aid of which they could rise above these mountain ranges." Steiner, R. (1904; GA11). Chapter iii: Our Atlantean Ancestors (link), in: Cosmic Memory: Prehistory of Earth and Man.