Las Grutas is a beach resort town located in the Argentine province of Río Negro, in the department of San Antonio, with a stable population of 8,000 inhabitants. It's located 15 kilometers south of San Antonio Oeste, and is visited by over 400,000 tourists every summer. Its beaches are known for having relatively warm waters in spite of their location in Patagonia, due to the wide tidal amplitude, and the protection of the San Matías Gulf.