Julian Beever is an English artist that creates surreal chalk drawings on pavement surfaces. His art is sometimes so convincing that people avoid potholes he has drawn on a pavement. His nickname is "the pavement picasso". His chalk art can take.
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.