This is a list of buildings and other structures that have been envisioned.
The definition of "vision" is that used by the Council on Tall Buildings and Urban Habitat. The list does not include under construction buildings; these are listed at .
Envisioned structures Name Height Year of proposal Type Main use Country PlaceDescription Floors The Space Elevator 1895 Massive space tether Space tourism, space exploration, and space colonization Lewis, Leo; News International Group; accessed 22 September 2008. Pacific Ocean A long cable anchored on or near the equator and kept upright by the rotation of the Earth. N/AThe Skyhook Structure to minimum 1966 Giant exchange tether Space payload transportation undetermined undetermined An exchange tether which aims to reduce the cost of placing payloads into low Earth orbit. N/A The Orbital Ring to of minimal height 1982 Suspended ring structure around Earth Space tourism/exploration/colonization, space manufacturing, telecommunication, and space-based solar power undetermined undetermined The orbital ring is a concept of an artificial ring shaped cable placed around Earth and set rotating at such a rate that the apparent centrifugal force is large enough to counteract the force of gravity.Paul Birch, "Orbital Ring Systems and Jacob's Ladders - I", Journal of the British Interplanetary Society, Vol. 35, 1982, pp. 475–497. (see pdf) (Accessed 6 April 2016).Paul Birch, "Orbital Ring Systems and Jacob's Ladders - II", Journal of the British Interplanetary Society, Vol. 36, 1982, 115. (pdf).Paul Birch, "Orbital Ring Systems and Jacob's Ladders - III", Journal of the British Interplanetary Society, Vol. 36, 1982, 231. (pdf). A motorized platform is placed on the cable that runs in the opposite direction to the rotation of the ring at a speed that makes the platform become stationary relative to the ground. The advantage of this concept is its much lower altitude compared to a space elevator which has to maintain its center of mass around geostationary orbit. Multiple tethers can be connected from an orbital ring to the ground enabling mass-transport to space. N/A The Launch Loop 1981 Suspended Maglev track Space tourism, space exploration, and space colonization undetermined undetermined The launch loop is a concept that has been proposed for the purposes of orbital launch.PDF version of Lofstrom's 1985 launch loop publication (AIAA 1985) N/A Analemma Tower to 2017 Asteroid suspended skyscraper Mixed-use undetermined Americas: North America, South America "A futuristic skyscraper dubbed the 'Analemma Tower.' The building would hover majestically above the ground because it would be attached – wait for it – to an actual asteroid, in space, that is forcibly put into orbit around the Earth." N/A Scaled-down space elevator 2009 Pneumatic tower Tourism, communications, wind generation, and