The only snakes you should hope to meet in a cemetery is the symbolic snake, representing sin and Satan, hence the fall of Man.
This serpent sits on the grave of a member of the Order of FreeMasons.
The ancient image of a snake eating its tail is called ouroboros, a constant re-creation of itself. Thought to cheat death and gain vigor by shedding their skins they were also recognized as a symbol of everlasting life.
An intertwined snake forming an infinite number 8 also represents eternity.
A snake wrapped around a cross is a Masonic symbol, representing Christ’s crucifixion.
A snake on the rod of Asclepius (the Greek God of Medicine) represents a person who was in the medical profession.