Valle de Guadalupe, at the northern end of Mexico’s Baja Peninsula, is a luminous desert basin, its sandy soil the color of moon dust. At night, thanks to low humidity and minimal light pollution, you feel as if you’re in a planetarium. It’s rimmed by mountains, with the Pacific Ocean to the west, which gives the valley a Mediterranean microclimate, one that has fostered, with an assist from irrigation, a vibrant wine culture: It is Mexico’s answer to Napa. Only two hours from San Diego when the traffic gods are smiling, it has become a destination for weekend escapes, with a quiet, haunting, almost otherworldly landscape, still rough around the edges, interspersed with vineyards and close to the beach, all set to a norteño soundtrack.
The Seattle-based architect Tom Kundig…