Explore details about location Calle Unión. Calle Unión is a location situated within the Tijuana alongside other areas such as Guadalupe, Blvd. Gustavo Diaz Ordaz, Avenida San Marcos. Additionally, some smaller parts of Calle Unión include specific areas like Privada Ramón Rayón, Calle Padre Castellanos adding to the diversity of its landscape.