"Green River," Olafur Eliasson, 1998. The artist turned waterways green by introducing uranine, a water-soluble dye used to test ocean currents. Pictured here is the striking result in Moss, Norway, one of six locations where this piece was realized. Photo 3 of 8 in Eight of Our Favorite Works by Artist Olafur Eliasson by Allie Weiss

Eight of Our Favorite Works by Artist Olafur Eliasson

3 of 8

"Green River," Olafur Eliasson, 1998.

The artist turned waterways green by introducing uranine, a water-soluble dye used to test ocean currents. Pictured here is the striking result in Moss, Norway, one of six locations where this piece was realized.