The Sierra Madre Oriental (Spanish: [ˈsjera ˈmaðɾe oɾjenˈtal] (listen)) is a mountain range in northeastern Mexico. The Sierra Madre Oriental is part of the American Cordillera, a chain of mountain ranges (cordillera) that consists of an almost continuous sequence of mountain ranges that form the western "backbone" of North America, Central America, South America, and Antarctica. From Wikipedia
