Can you spot what each row of photos has in common?






cc licensed ( BY NC ND ) flickr photo shared by Ava Babili

cc licensed ( BY NC SD ) flickr photo shared by ~ Abdulhai A. Al-Abdulhai~

cc licensed ( BY NC ) flickr photo shared by ¬nick




cc licensed ( BY NC SD ) flickr photo shared by ianus

cc licensed ( BY NC SD ) flickr photo shared by Solskjaer99

cc licensed ( BY NC SD ) flickr photo shared by keepps




cc licensed ( BY NC SD ) flickr photo shared by iwouldstay

cc licensed ( BY ND ) flickr photo shared by Tambako the Jaguar

cc licensed ( BY NC ND ) flickr photo shared by Márcio Cabral de Moura




cc licensed ( BY NC ND ) flickr photo shared by raphael.gerber

cc licensed ( BY NC ND ) flickr photo shared by marcokalmann

cc licensed ( BY NC ND ) flickr photo shared by So gesehen.




cc licensed ( BY SD ) flickr photo shared by SteelMaster Buildings

cc licensed ( BY NC SD ) flickr photo shared by pmecologic

cc licensed ( BY SD ) flickr photo shared by SteelMaster Buildings




cc licensed ( BY ) flickr photo shared by mckaysavage

cc licensed ( BY NC SD ) flickr photo shared by herzogbr

cc licensed ( BY ) flickr photo shared by James Qualtrough




cc licensed ( BY NC SD ) flickr photo shared by Arthur Chapman

cc licensed ( BY NC ND ) flickr photo shared by eatswords

cc licensed ( BY NC SD ) flickr photo shared by dreamX




cc licensed ( BY ) flickr photo shared by RukaKuusamo.com

cc licensed ( BY NC ND ) flickr photo shared by Devonaire Eye

cc licensed ( BY NC SD ) flickr photo shared by KurtVon