Facebook pages that include Baja California history:

Baja California Land of Missions Book Group
BC&BCS HISTORY
Pueblos y ranchos de mi Baja California Sur
Baja California Topo Maps
Petroglyphs, Pictographs, and Rock Art of North America
Life in San Felipe (old photos)
Familia Arce
Javier Cota M. CALIFORNIAS SIN FRONTERAS

Other Baja California Facebook pages: 

Viva Baja Group
Baja Overlanding
RVing in Baja
Camping & RVing in Baja
Baja Vanlife
Comunidad Overland Baja California
Slow Baja Community
Sierra San Pedro Mártir Group
Beyond Balandra
Baja Lovers
Baja Visitor Community
Baja Nomads
Puertecitos Happenings
Cabañas La Pasión camping
Ride Baja
Banned from Talk Baja Group
Bahía de los Angeles Info
Mulegé News
Hey Mulegé
Playa el Coyote, Bahía de Concepción
Remote White Beaches
Hidden Baja

Know of other interesting, non-commercial Facebook pages? Submit your nominations to add here. Email them to info@vivabaja.com