The town is well-known for white truffles that grow in its vicinity. There's even a festival every November. Gourmets' capital.
Wikipedia http://en.wikipedia.org/wiki/San_Miniato#White_truffles
Address 14 Via Augusto Conti, San Miniato 56028, Italy
Coordinates 43°40'47.178" N 10°50'59.213" E