Image courtesy of Street Art Magic
Image courtesy of Adeline & Baptiste
Image courtesy of alexchinneck
Image courtesy of Marc Quinn
Image courtesy of Brian Fell
Image courtesy of Jerzy Kedziora
Image courtesy of Neil Dawson
Images courtesy of Elisabet Stienstra
Image courtesy of Tom Frantzen
Image courtesy of Bruno Catalano
Image courtesy of Gerry Judah
Image courtesy of Lorenzo Quinn
Image courtesy of Leandro Erlich
Image courtesy of David McCracken
15. Albedo (USA) 
Image courtesy of Emil Alzamora
H/T: brightside
