- Official website of the Mexican state of Coahuila.coahuila.gob.mx
- Information about industries, hotels, restaurants, shopping, sightseeing, business, transportation and history in Piedras Negras, Coahuila, Mexico. Spanish language.www.piedrasnegras.gob.mx
- Hotel Hacienda Rancho El Morillo, Saltillo, Coahuila, Mexico, bed/breakfast, family features, full meeting facilities, private retreat, special menus, cabana, heated pool, forty acres of nature ...www.elmorillo.com