Jaume Plensa’s two 50ft-high glass-square pinnacles contain video shows that streak a thousand unique appearances of local people. Each mug puckers up and sprays water, much the same as the foreboding figures on Notre Dame Cathedral. A new arrangement of non-puckering faces shows up in winter when the wellspring is dry. On hot days the wellspring swarms with local people sprinkling around to chill. Children particularly love it.