Radial Symmetry.  This is a Candian thistle. It is noxious and a land owner will be fined if they don't get rid of them.  But they are still pretty.
 

 The challenge was "on the fence".  The decision which to eat is on the fence.  Thanks to Dennis for posing for me.  

 

Abandoned was the challenge.  I couldn't come up with much because Ricky didn't want us depending on old buildings or vehicles.  This is the road east of our house that is used so little that the grass is growing up in it.  Plus one of the neighbors has opened a gate that almost blocks the road to anyone who might use it.