What city in Texas is closest to Mexico?

Could you elaborate on the specific city in Texas that is the closest proximity to Mexico? It's a known fact that Texas shares a border with Mexico, but pinpointing the exact city that is closest to the neighboring country would be quite insightful. Is there a particular city in Texas that stands out as being the closest, or is it a more generalized area along the border? I'm eager to learn more about this geographical feature.