Banksy uses graffiti to comment on the city and society. Check it out. http://www.banksy.co.uk/
Parklets
This is why we do not need parking for cars but people!
http://inhabitat.com/andersonville-parklet-is-chicagos-first-permanent-parking-space-urban-oasis/andersonville-parklet-moss-design-1/?extend=1&goback=%2Egde_97473_member_145064708
space and art: new perceptions
These are interesting art piece that plays with the idea of perception - what we think we see, what are the implications of perspective, how is a view constructed. Don't just look at the image but try to understand how he did the artwork:
http://www.varini.org/02indc/
And you can then translate the idea into super graphics to create a whole new way of getting information in space!!
http://lifewithoutbuildings.net/2008/08/a-new-perspective-on-navigating-parking-structures.html