After first exploring and then passing through the little-known border town of Sasabe, Arizona, journey to a mission in Northwestern Mexico. Labeled by locals as "Heroic Caborca," this mission actually was used as a fortress by the local townspeople. Using this mission, they successfully defended their town from an invading militia from the United States in the 1800s. To this day, bullet holes in the walls convey vivid evidence of battle. Along the way, enjoy a rare, sensational spring wildflower display. Also, examine evidence of prior human habitation in the form of petroglyphs.