architect santiago calatrava is currently working on the chicago spire, a massive 600m skyscraper that will dominate the chicago skyline when it is complete in 2011. the building will have 150 floors featuring around 1,000 residences and will be the second tallest building in the world. unlike other tall buildings which are multi-functional the project will be an all residential building.

 

the chicago spire santiago calatrava designboom
overview

 

the twisting design of the chicago spire was inspired by nature, as most of santiago calatrava’s work is. particular influence was drawn from the spiralling shape of snail shells. each floor is rotated 2.44 degrees from the one below it, totaling 360 degrees. sustainably speaking, the building is planned to receive a gold LEED rating.

the apartments that are found in a building of this monumental stature are definitely not cheap. indeed, rent prices range between 750,000 and 40 million USD.

the chicago spire santiago calatrava designboom the panoramic  view from floor 140 'the chicago spire' by santiago calatrava view from the ground level

'the chicago spire' by santiago calatrava the facade looks like a twisting spire

'the chicago spire' by santiago calatrava
the structure would accommodate around 1,000 residents

'the chicago spire' by santiago calatravasketches  by santiago calatrava: working through the conceptual design

'the chicago spire' by santiago calatrava sketches by santiago calatrava: details of the facade

 
via kottke