Recycled CDs Form Colorful Floating Waterlilies by Bruce Munro. Again, i love re-purposed art; art made of trash. This was quite interesting and i think would look good as an instillation in some city.
Doris Salcedo, Installation at International Istanbul Biennial, Salcedo's idea was to create a "topography of war"--not tied to a specific historical event, but to war in general. wooden chairs piled high between two buildings in central Istanbul.
Invasions - Charles Pétillon, 2015. An art installation with white balloons invading public space. A weird balloon cloud passes through a white painted basketball hoop.