I say potato.

In one of the quiet corners [of Peru] is the world renowned potato hunter; Carlos Ochoa, justifiably called the Indiana Jones of the potato. Turning his back on the comforts of family and city life, the 75 year old has tramped through South America for the last forty years in search of the perfect potato. In this time he has frequently had to brave bandits, guerrilla's and freezing temperatures , but has also discovered 80 new wild potato species.