seen this month:
Canard Mort - Albrecht Dürer watercolor from 1502, Kunsthalle Karlsruhe.
At the Kunsthalle Zürich:
Click here to see Schattenspiel - by Hans-Peter Feldmann (Düsseldorf 2002-2007). I wanted to watch the pizza boxes spin all day.
Crazy detail in every squaremillimeter of this tiny painting on copper:
This video by Pipilotti Rist is installed right in front of it, in the floor, and you only notice after a while that someone is actually yelling at you from below the carpet.
Lastly, I don't know who makes them but you can see them all over Zürich: