In April 2019, the members of the club “Nature wonders” from Istituto Comprensivo “Giovanni Pierluigi” Palestrina from Palestrina (Italy) created a PowerPoint presentation about the Castellana Caves from the region of Puglia, in which they also talk about karst, carbonate dissolution and pH levels. You can see it by following this link: https://drive.google.com/open?id=1QQ1BasLufab0IS_Qtj3QpE5chh33RTQM or you can watch it below in video format.
Presentation about caves created in April 2019