My wife is Mexican and she has introduced me to a bunch of interesting food:
Menudo, cow's stomach in broth.
Tripas, small intestines of farm animals that are cleaned, boiled and grilled.
Tacos de lengua, or tongue. Lengua burritos are tasty.
For me, One is the greatest metal song ever. At their show in September they played One, For Whom the Bell Tolls, Master of Puppets, and Enter Sandman in succession.