Rental cars come in handy when exploring Baja. Countless paved and dirt roads branch off Highway 1 like octopus tentacles beckoning adventurers toward the mountains, ocean, and sea. Baja Sur's highways and city streets are under constant improvement, and Highway 1 is usually in good condition except during heavy rains. Four-wheel drive comes in handy for backcountry explorations, but isn't necessary most of the time. Just be aware that some car-rental companies void their insurance policies if you run into trouble off paved roads.