<p>Earth Science education is at a turning point framed in a social and cultural way. The idea of sustainability and, consequently, accessibility to the educational system has shown important advances since the publication of the Sustainable Development Goals of the 2030 Agenda. The UNESCO Global Geoparks are internationally recognized as educational engines in pursuit of sustainability and instruction in geosciences, and they are making use of alternative teaching methods to get their message worldwide. Focused on geotourism and development, they try to continuously update themselves in order to offer quality education and accessibility for everyone. Information and communication technologies (ICT&#8217;s) keep also evolving and they are used as an interesting support within cognitive development and education at all levels. Voice-over is a classical tool used since the beginning of the recording era (radio, film, television, media ...) to communicate a specific message and transmit it adequately and coherently to the receiver.&#160; It is mainly based on the correct use of the human voice to generate sensations and create, in an artistic way, an emotional atmosphere that keeps the viewer attentive to what you want to convey. The nuances, tones and melodic curves mean that no voice is the same as another and the information is disseminated in very different ways depending on that. In recent years, it has been possible to observe a great increase in the use of voice-over and an exemplary care in the selective tone of the messages that has been reflected in sectors such as advertising, general media or scientific documentaries. The promotion of its use in Geoparks as educational support in audiovisuals, presentations or even in geological routes, tailor-made for different collectives, is a key factor to take into account to facilitate the understanding of the information, increase the degree of accessibility and contribute, thus, to the Sustainable Development Goals.</p>