The ruins of the castle of Giovagallo emerges with difficulties from the vegetation. They are reachebable through a path near Agneda.
Though, it is a very charming place. Here Dante have met Alagia Fieschi, Morello Malaspina’s wife, who, according to the legend, persuaded him to finish The "Commedia", and met Manfredi, the son of Corrado l’antico, as well.

More information:
The village of Giovagallo
The castles of Licciana Nardi