Sadali rises on a limestone plateau in the Barbagia di Seulo region, in the hinterland of Sardinia. The largely mountainous region is called the island within the island for the peculiarity of its wild and alien-like landscapes. The borgo’s narrow cobblestone streets, lined with ancient houses, suddenly leave space for wide views over the valley of the Flumendosa river. Oak forests and Mediterranean scrub surround the borgo, whose varied territory has been inhabited since the Nuragic era: fragments of pottery dating back to the prehistoric and Roman eras were found at the nearby Nuraghe Accodulazzo. Sadali is the only borgo in Sardinia with a waterfall in the town centre, the San Valentino waterfall, fed by perennial springs. It gets its name from the nearby ancient Church of San Valentino, around which the borgo was built, before 1335. You can admire the force of the water as it runs along a green crag and flows into an underground precipice known as Sa Bucca Manna, the great mouth. In feudal times, the force of the water activated 8 mills. One of the water mills has been restored, built in the 17th century; it was used for over two hundred years for the grinding of wheat and is now open to the public. The very old Church of San Valentino has gone through four distinct periods, from the Romanesque to the last restoration works in 1996, which brought to light a Roman kiln used for firing bricks, completely intact.