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.
Mirror Projection : Feeds my love of reflected light. Combine this with water somehow and it is a home run. This would be awesome mounted light on ceiling with projection on the wall as a permanent light feature in a house