Centro Internacional de Convenciones de la Ciudad de Madrid

The International Convention Center of the City of Madrid was an ambitious skyscraper project planned to reach 119 meters in height, featuring three auditoriums with a capacity for 30,000 people. Although construction began, it was halted in 2012 due to financial issues after €100 million had been invested. The site has since been repurposed for Caleido, a new 181-meter skyscraper that will include a private university, a hospital, and a shopping center, showcasing Madrid's evolving urban landscape.