Explorer Juan Rodríguez Cabrillo (pictured), the first European to travel along the coast of California, landed at what is now the city of San Diego.

Juan Rodríguez Cabrillo was a Portuguese maritime explorer best known for investigations of the west coast of North America, undertaken on behalf of the Spanish Empire. He was the first European to explore present-day Alta California, navigating along the coast of California in 1542–1543 on his voyage from New Spain.

California is a state in the Western United States that lies on the Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares an international border with the Mexican state of Baja California to the south. With almost 40 million residents across an area of 163,696 square miles (423,970 km²), it is the largest state by population and third-largest by area.

San Diego is a city on the Pacific coast of Southern California, adjacent to the Mexico–United States border. It is the eighth-most populous city in the U.S. and second-most populous city in California with a population of over 1.4 million, while the San Diego metropolitan area with over 3.3 million residents is the 18th-largest metropolitan area in the nation. San Diego is the county seat of San Diego County. It is known for its mild Mediterranean climate, extensive beaches and parks, long association with the United States Navy, and recent emergence as a wireless, electronics, healthcare, and biotechnology development center.