Priorat is a small wine district in Spain's Catalonia region. With its glory days in the distant past, Priorat slumbered through most of the 20th century, impoverished and forgotten. Then in the 1970s, a group of outsiders—idealistic and indefatigable—arrived with a vision of a new Priorat. The passion and hard work of these visionaries reinvigorated the region. Wine Spectator's executive editor Thomas Matthews explains.