The beauty of this building may prompt you to think it is an art gallery or museum rather than an office building. But the 13-storey headquarters of the Basque Health Department is one of the iconic buildings in Spain. It was designed by Coll-Barreu Arquitectos. Its polyhedral glass facade allows the natural light to enter inside and make the interior luminous and also reflects the sky. It is one of the popular tourist attractions in Bilbao.