cardboardamerica@gmail.com:
International Bridge - Laredo, Texas & Nuevo Laredo, Mexico
cardboardamerica@gmail.com:
International Border - Tijuana, Baja California
cardboardamerica@gmail.com:
Avenue of Flags and Twin Spans of the New Immigration Station - Nogales, Sonora
cardboardamerica@gmail.com:
Juarez, Mexico & El Paso, Texas
cardboardamerica@gmail.com:
Falcon Dam - Mexico-Texas Border
cardboardamerica@gmail.com:
Detroit International Bridge - Detroit, Michigan
cardboardamerica@gmail.com:
International Boundary - Nogales, Arizona
cardboardamerica@gmail.com:
Piper at Amherst Border, Nova Scotia