The tallest skyscraper in Spain is now under construction in Madrid.
The 700-foot-tall Torre del Espacio ("Space Tower") is unlike any other
tall building. It's the only skyscraper in the world where every single
floor plan is completely different--a design feature dictated by the
spiraling shape of the structure. Unlike run-of-the-mill skyscrapers,
building a floor can't be accomplished with traditional construction
techniques. Nothing is rectangular, support columns tilt at atypical
angles, and the concrete forms used to lay out each floor constantly
change as the building rises. Only when the emerging shape of the
rising building becomes clear will the team know if they've made an
error in construction