They've lived in southern Texas for years, but have never been south of 'the border'. [=the U.S. border with Mexico]
The neighborhood 'is bordered' by Main Street on the north and the river on the south.
She's from northern Montana, near 'the border'. [=the U.S. border with Canada]
(..) A monkey's uncle. Heh heh. You're so weird. You have no idea.... So, your father showed you the whole kingdom, did he? Everything. He didn't show you what's beyond that rise at the northern border...? Well, no... he said I can't go there. And he's absolutely right! Well, I'm brave! What's out th-- (..)1994 The Lion King