Many symbols, like the hanging and broken bud, the broken column, and the broken wheel represent the end of life’s journey.  This gravestone in Wunder’s Cemetery in Chicago is carved in limestone in the likeness of a tree with a broken wheel leaning against the bottom of the tree.  With a closer look at the wheel one can see that the circle is incomplete at the bottom with two spokes hanging freely.  The wheel is a metaphor for the circle of life which is broken by death.