San Diego-Tijuana is a vibrant border region located between the United States and Mexico. San Diego is a major city in California known for its beaches, parks, and cultural attractions, while Tijuana is a bustling city in Mexico famous for its nightlife, cuisine, and art scene. The two cities are connected by the international border, making them easily accessible to visitors. The area is characterized by a unique blend of cultures, languages, and traditions. People often cross the border for work, shopping, and entertainment. The San Ysidro Port of Entry is one of the busiest border crossings in the world, facilitating millions of crossings each year.