Museo Historico Regional gives Ensenada a useful historical anchor, especially if your visit otherwise revolves around the waterfront, fish market, and wine country. The museum occupies an old barracks and prison complex, so the building itself carries part of the story before you reach the exhibits.
Displays cover the peninsula's Indigenous cultures, mission period, military history, and the growth of the port. It is a modest museum, but it helps explain why Ensenada feels different from resort towns farther south on the Baja coast.