This tree had me bleeding in a few places on the arm (stupid thorns) while placing the cache so why not call it a blood thirsty vampire as it is being published near Halloween! <grin> Be careful! 
Sponge Bob would have no problem as he's full of holes anyway!!
Congrats to meghanpenny for First to Find!
I think it is an Osage Orange (Maclura pomifera) tree... any tree experts looking at it, let me know please! :)