At Plaza de Colón in Madrid, Spain, there is a twin building that is known locally as "El Enchufe" or "The Plug" for it is said to resemble a giant electrical plug. Its formal name is “Torres de Colón” or the Columbus Towers. Some say it is the ugliest building in Madrid. Its green art deco-style top, and copper and smoked glass façade doesn’t inspire much pride among the city’s inhabitants. Nevertheless, Torres de Colón has been an icon of Madrid’s skyline since it went up in 1976. It harbored great curiosity while it was being built, for Torres de Colón was built from top to bottom.

Construction stages of Torres de Colón.