Amazing gorge to visit
Gola di Gorroppu is one of the top day-trip destinations in Sardinia. It's the type of place that'll give you the distinct sensation of being very small in comparison the gigantic canyon walls, and even smaller in comparison to the forces of nature that gave way to this natural wonder. During heavy rains, it fills with a torrential river since the karstic landscape forces water out of the underground aquifers and onto the land. This is truly nature at her finest.
At the entrance to the canyon, there are guides who'll explain lots of details and facts to help you get the most out of your visit. I'd suggest taking a walk through the canyon in silence to really soak in the pristine environment.