This is a work of art in a pond at the Prince Park district of Rotterdam "Prins Alexander". SC is making a picture of me and the waving one is also an Alexander but not a Prince.
This is the complete "Square Island" art work made by "Frans de Wit". In the middle of this concrete structure is a square. This gap represents the lowest point in the Netherlands: seven meters below sea level. The construction of the square and circle, forming a scale with increasing beam and meassuring 55x55 meters. Have a look at SC's blog for more pictures here.