BOOK OF ABSTRACTS International Conference on Geotourism, Mining Tourism, Sustainable Development, and Environmental Protection Editors Ugolini F., Marchi V., Trampetti S., Pearlmutter D., Raschi A. IBIMET-CNR, Firenze. 18-20 October 2016 Aula Magna of the SAGAS Department, Università di Firenze Proceedings of the GEOTOUR 2016