Arlington, Virginia (CNN) -- It may surprise the casual visitor at Arlington National Cemetery to see a rubber duck on a headstone or an old football helmet lying in the manicured grass of a fallen soldier's grave.

CNN: STORY HIGHLIGHTS

While not every casual visitor wants to wield a spear, it can be a more appealing prospect than the average eco-tourist might imagine.

BBC: Hunting possums �C and ecological balance �C in New Zealand