This image shows the approach to the international crossing between Eagle Pass, Texas and Piedras Negras, Coahuila, In Mexico.

The description states:
INTERNATIONAL BRIDGE at Eagle Pass, Texas links two very favorite cities on the Mexico border. Thousands of American tourists cross here on their way to the interior of Mexico, while Mexican citizens visit the American side to shop at the many well-stocked stores in Eagle Pass. Peidras Negras is one of the prettiest Mexican towns on the border. The building in the background is the new American Customs Building.
–Eagle Pass is a small city, with a population of less than 30,000. Piedras Negras, in contrast, is estimated to be almost 140,000.
This card likely dates from the 1960s.