The White Truffle (Tuber magnum pico) is the world’s most
expensive edible fungus, fetching up to U$3,000 per kilo. They
can only be found in the Italian regions of Piedmont,
Emilia-Romagna, Tuscany and Marches, and the Istrian peninsula of
Croatia, and because they grow about a foot underground, they can
only be located with the help of trained dogs.