Check out these wild, chaotic worlds by illustrator Elliot Freeman. He works in my favorite medium, collage, using large fields of color and flat shapes to create very graphic compositions. To give them personality and life, Elliot uses some line work to define the finer points of the illustration. In doing this, he really creates worlds within worlds. Take a look on the red rocks on the second piece below.
All images via his Tumblr. Follow him on there!