Piedras is at the northern border in the state of Coahuila, Mexico. It sits on the other side of the Rio Grande from the Texas border town of Eagle Pass, and is just about 150 miles southwest of San Antonio.

Fun Facts:
Translation: black stones
State: Coahuila
Population: 152,806
Area: 353 sq. miles
Mayor: Fernando Purón
Founded: 1850
Time Zone: Central
Climate: Desert