"She Changes", Matosinhos, Portugal
The sculpture is designed to reflect Porto's and Matosinhos's sea-faring and industrial heritage. The three support poles are painted to resemble the smokestacks and lighthouses in the area. The net structure is meant to reference the city's fishing industry.
The three support poles range in height from 25–50 m in order to hang the 20-ton, 45 m diameter steel ring at an angle to the ground. The net is woven together from 36 individual sections of varying densities, which give the net its shape. The net material is made of TENARA architectural fiber, a UV-resistant material made of PTFE. - wiki