The Torre Agbar, or Agbar Tower, is a 33-story tower in Barcelona, Spain. It opened in 2005 and has some unusual nicknames because of its shape. It is covered with a facade of glass, and over 4,500 window openings; and temperature sensors in the outside of the tower that regulate the opening and closing of the windows, reducing the consumption of energy for air conditioning. Close-up in neighboring photo.

The Torre Agbar, or Agbar Tower, is a 33-story tower in Barcelona, Spain. It opened in 2005 and has some unusual nicknames because of its shape. It is covered with a facade of glass, and over 4,500 window openings; and temperature sensors in the outside of the tower that regulate the opening and closing of the windows, reducing the consumption of energy for air conditioning. Close-up in neighboring photo.