Seminole Canyon, Texas
Nestled along the United States-Mexico border in southwestern Texas and northwestern Coahuila, the Lower Pecos River Archeological region encompasses an area of about 7900 square miles. Though this cultural region is fairly small, more than 2,000 archeological sites have been recorded. These sites cover a time span from the 19th century to over 10,000 years ago. Over 325 pictograph sites have been documented containing some of North America’s oldest and largest pictographs.