The dolines are depressions of karstic origins, somewhat like small craters. They are conical holes caused by the erosion of rock by rainwater and other atmospheric agents. Some of them are full of stones from the clearing of fields and then covered by a layer of fertile earth and animal manure.
There are hundreds of dolines in the are of the Gargano, perhaps the highest density on the promontory. The largest, second only the doline of Pozzatina in the countryside of Sannicandro Garganico, is the Centopozzi Doline. It owes its name to the countless man-made wells, some of which have been filled today, that were once used as a water supply.
In theNational Park of the Gargano, the doline has benefitted from a successful recovery-restoration of its main wells, of drywalls, and numerous other natural attractions that make up this wonderful landscape.