A picture from the Aqueous Electreau series by photographer Mark Mawson. This stunning image was created by dropping different hues and densities of paint to water. The result is complex kaleidoscopes of colour that Mark describes as "alien".
Jaume Plensa, Crown Fountain, Chicago, southwest corner of Millenium Park. Glass towers stand at each end of a shallow reflecting pool. Faces of Chicago residents are displayed onto LED screens - looks like they are spitting water.