The four buildings of the CTBA, are standing next to each other, and on this photo, you can see the reflection of Torre Espacio (Space Tower), on the Crystal Tower.
The Crystal Tower, is located North of Madrid. With its 249 meters and 52 storeys, it is the tallest building in Spain and the eighth in the European Union., according to the Council on Tall Building Urban Habitat (CTBUH).
This building is diamond-shaped, designed by Argentinian architect, Cesar Pelli. This skyscraper is defined by a pure crystal blue tint, that enhances its elegance and transparency
Torre Espacio (Space Tower), is one of the tallest skyscrapers in Spain and Europe.
It has a height of 230 meters and 57 floors above ground level. The exterior of the building is covered exclusively with glass.
The lower floors are square shaped and as the height increases they change until reaching an ogival shape, forming a curve representing the mathematically function cosine.