Water Tower Skyline by Nina Boesch
I miss subway tokens — the cool, transit-only currency of old. Nowadays, subway stations are littered with MetroCards, the credit-card sized single and multi-ride tickets. NYC-based designer Nina Boesch creates collages out of these discarded MetroCards, rendering all sorts of NYC-centric subjects in the characteristic shades of blue and yellow.
World Map by Nina Boesch
Guggenheim II by Nina Boesch
Brooklyn Bridge with Skyline by Nina Boesch
Cabs -- Aerial View by Nina Boesch
Check out MetroCard Collages for more examples of Nina’s work, and also a fun tool that lets you upload your own photo to see what it would look like as a MetroCard collage. Via the excellent Subway Art Blog.
Department of Everyday Visualingual 
Finally, creative reuse of something so ordinary and functional! I love it. Thank you so much for sharing!
Agreed. And, hey, you can DIY your own version out of similar cards from your local transit system.