The territory in Bagnone Commune is rich in naturalistic and cultural attractions. The medieval village, still perfectly preserved, appears suddenly out thick green forests of pine trees, holm-oaks and oaks. A number of paths take into the woods, along the river that gives the name to the town. The most interesting buildings are: villa Ruschi-Noceti and a cylindrical tower; in the lower part of the town there are also some interesting arcades (via della Repubblica) and an old marketplace.

In the neighbourhood there are some interesting castles and towers, dominating the green slopes of the surrounding hills. The most important of them is in Castiglione del Terziere, one of the best preserved villages in Val di Magra. "Terziere" was added to the village's name when the little town was annexed to the "pars terziaria", that is to the third part of Alberto Malaspina di Filattiera's feudal possessions. The castle, built in early medieval times, is still intact. Inside there are many rare pieces of furniture and paintings perfectly restored.

The castle also hosts the Center for Classical Studies Nicolò V, and a private library with over twenty-thousand volumes. Also, in Castiglione there is the Museo del Territorio which illustrates the long story of the Valle. Finally, in the last few years it was founded the "Circolo Cosmopolita di Castiglione del Terziere" (Cosmopolitan Club of Castglione), meeting point for architects from all over the world, specialised in castle restoration; many of their projects are put into practice in the Val di Magra and in the surrounding regions.