Castilla y León is a Spanish geographical indication (I.G.P.) for wines located in the autonomous region of Castilla y León.
Vino de la Tierra is one step below the mainstream D.O. indication on the Spanish wine quality ladder.
They fall outside the "Vino de la Tierra de Castilla y León” wines made in Castilla y León but who already have own D.O. as for example, D.O. Bierzo, D.O. Toro, D.O. Cigales, D.O. Ribera del Duero, and so on.