Chiapas is a southern State of Mexico, with great potential for tourism supply and demand, offers three destinations recognized by UNESCO: Palenque (Cultural Heritage), Chiapa de Corzo (Intangible Cultural Heritage) and San Cristóbal de las Casas (Creative City). Its indigenous Maya population has a high social lag rate. This study analysed the offer of tourism products and public policy with qualitative methodology. The impact on cultural identity was identified from the perception of the resident population, with quantitative methodology using factor analysis with impact levels positives and negatives. This study aims at answering the following questions: which UNESCO destinations in Chiapas show a high positive impact on their cultural identity and why does slow tourism enable their preservation and development? Areas of opportunity for living cultures are identified through slow tourism (ST) and in public policy through the implementation of strategies that contribute to preserving heritage and improving the living conditions of its inhabitants. Key words: Cultural identity, Intangible and Tangible Heritage, Indigenous culture, Slow tourism (ST), Social Backwardness Index (SBI), Development strategy.