The ruins of the Tower, or Rocca, of Bargiglio stand on the top of the mountain of the same name at 866 meters above sea level at the gates of Garfagnana and the Media Valle del Serchio.
Once you arrive at the Tower, it is clear why it has always been called the "Eye of Lucca": the view is panoramic at 360 degrees and offers a perfect view from the peaks of the Apuan Alps, with the Pania di Corfino clearly visible, to the numerous castles and fortresses of Garfagnana, such as the Castiglione Castle and the Mont'Alfonso Fortress. From here you can also dominate the entire Serchio Valley below, from the walls of Barga and Coreglia Antelminelli to Bagni di Lucca, up to the many towns in the Municipality of Pescaglia. And finally, in the distance to the south, the Lucca plain and then the Tyrrhenian coast.
The origin of the fortification dates back to an unknown era, probably built by the Suffredinghi, one of the three potentates of Lombard origin who controlled the Serchio Valley who distinguished themselves for their tenacious resistance to the expansionism of the Municipality of Lucca, being bordered by the Este dominions of Garfagnana. It consisted of only one tower, used as an observation and control point of the vast territory, of the road that passed a little further down and of the small community that lived in the farmhouses surrounding the fortification and the ancient Hermitage of S. Bartolomeo.