Join 'festival' upcoming events being held in San Martín Itunyoso. San Martín Itunyoso is a picturesque town in the Mexican state of Oaxaca, nestled in the Sierra Sur mountains, known for its rich Mixtec cultural heritage, traditional Zapotec-style weavings, and natural beauty, including the stunning Cascada de Yoltehui waterfall, making it an ideal location for visitors seeking to immerse themselves in Mexico's vibrant indigenous culture and breathtaking landscapes.