The Geode Project is a project by Julian Smith of A Common Name. In this project Julian finds voids in the city and fills them with these paper geodes. This is probably one of my favorite street projects just because of the attention it brings to the voids that are often overlooked.
I love the idea of a table top zen garden, partially because I am a procrastinator and anything to fill my time that isn't work I'm all for. When I first saw these I fell in love, their simplicity partnered with their (in some cases) very bright colors with the very structural ball cacti really make these little pieces perfect.
Maskull Lasserre is a Canadian artist who takes everyday objects and transforms them into things that make you do a double take. Three Degrees of Certainty is an amazingly detailed rendering of a human skull in a stack of books. These kinds of pieces always amaze me but the skull within these books just seemed to click.