Plaza Callao, Madrid

The Callao Square is located at the centre of the Spanish capital of Madrid. The square was substantially and aggressively reformed in the 21st century. The reform removed nearly all elements present by that time, except the metro station access and a big tree, turning the square into a pedestrian and homogeneus space, while adding a limited number of pieces of urban furniture. Conversely, big screens were added to the surrounding buildings. © iStock/chris-mueller