California, officially the State of California, is a state in the western part of the United States. It is the third largest state by total area and the largest by population in the United States. Its largest cities are Los Angeles, San Diego, San Jose, and San Francisco. The capital is Sacramento. It is bordered by Arizona to the southeast, Oregon to the north, Nevada to the east and the Mexican state of Baja California to the south.

Costa Rica, officially the Republic of Costa Rica, is a country in Central America, bordered by Nicaragua to the north, the Caribbean Sea to the northeast, Panama to the southeast, the Pacific Ocean to the southwest, and Ecuador to the south of Cocos Island. It has a population of around 5 million in a land area of 51,060 square kilometers (19,714 square miles).