Most important cities include Tijuana, Mexicali and Ensenada.
Cabo San Lucas
Tijuana (1.18 million) right at the US-Mexico border holds that distinction.
On a map, yes. California is one of the United States of America. Baja California is one of the United States of Mexico and lies south of California and north of Baja California Sur. (In the Spanish...
No, Baja California is located south of California and is a part of Mexico.