Tiscali - ancient village in gigantic semi-collapsed cave, built by locals hiding out from Roman slave raids. The cave has huge steep walls of golden flowstone and would be a world-famous mecca for hard sport climbing if it weren't for the pesky ancient ruins.We went to Tiscali with a guide from a jeep tour company in Dorgali. Wouldn't know how to get there without a guide, but I assume it must be possible. Quite a steep hike on non-obvious paths though.Goroppu Canyon also v. impressive.
First of all we spent 5 nights in Cala Gonone. Had planned lots of hikes/Canyoning stuff/random karst cave exploring and what have you, but in the end it was SO HOT that we did nothing but swim in the campsite pool or swim in the sea. The thought of heading out into the sun in the 37+ degree heat was insane.We then went the West side and camped on the coast near Oristano. Fantastic chilled agricamping place near the beach, but not much to do nearby except beach stuff, and then headed North for a few days near Castlesardo.Overall, some great beaches, snorkeling etc, and we had a brilliant time, but it was just too hot to summon any interest in doing anything. Corsica has much more mountians and height so you can do more in the heat, where as Sardinia is much lower and hotter feeling. Don't go in August, that would be my tip.