An itinerary runs through the village, in an almost surreal atmosphere, to  discover the "painted walls", a permanent exhibition of great interest, created by Italian and foreign artists and based on the idea of the painter Benito Biselli.

The originality of the paintings, topics, styles and techniques represent different artistic vernaculars, from the figurative to the informal and giving form and colours to the old walls.

Mugnano began to attract the critics in the 1970s, when the village hosted four high-level temporary exhibitions of important artists. Over the years, the idea evolved, transforming the event from temporary to permanent. In 1983 "In...contriamoci in Mugnano" was organized for the first time. This is a large village festival, held every year between late June and early July, which in addition to proposing traditional dishes and local wine, adds permanent modern art to the ancient architectural structure and its small alleys and squares. That year, the first eight local painters were called on to complete the "painted walls", which aroused great critical attention. The following year, the event was also opened to foreign artists and today has reached more than forty murals.
In the days leading up to the festival, the village is enlivened, with scaffolding  mounted in front of the walls and the artists begin their work surrounded by a crowd of curious onlookers and insiders.

"The walls of the village sing a sudden flowering of works, a rhythmic writing of pictorial seals where each artist has placed the juice of his creativity" (Mimmo Coletti, 1990).

Since 2008, the route is completely illuminated with energy-saving lights, so it can be enjoyed even at night.