One of the two Torres Kio, Madrid (Torre Kio Este).

Revolutionary for the early 1990s, these leaning towers were a noted landmark and perhaps still are, even if the nearby Cuatro Torres now steal their limelight.
The main bus terminal for buses to the north lies underground here on many levels. I just missed my bus by seconds so had two hours to wait for the next one (a much reduced summer 'service'!). With time to kill I went for a walk and took this shot on a whim.
This wikipedia entry may be of interest; es-m-wikipedia-org.translate.goog/wiki/Puerta_de_Europa?_x_tr_sl=es&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=sc