Waterfhole. Sinkhole waterfall in Sardinia forested inland. Italy.

Sardinia, Italy. In a narrow canyon surrounded by limestone cliffs, a unique place forged by nature and by time is hidden in the deep of the forest: it’s a sinkhole with resurgence, whose waterfall feeds a pond. Depending on the time of the year and the weather, the waterfall can grow from a feeble stream to a roaring gush.