The town, situated 765 metres above sea level, is divided into numerous villages among the chestnut and walnut woodland and enjoys a dry climate protected from the wind and is mild all year round.
As you can imagine from the name, this district was the first possession of the noble and rich House of Challant, whose historical fortunes were closely tied to those of Valle d’Aosta.
The most notable monument in the area is the parish church of San Vittore, a church with typical Valdostane architecture, with a single nave, an ancient foundation and rebuilt at the end of the XVII century. It still retains its fifteenth-century door and buttresses.
The building was financed by the Counts of Challant, whose noble crest can still be seen on a keystone and above a buttress. Inside, you can see a precious, fifteenth-century crucifix.
The ruins of Villaz castle, on a rock slightly after the town of Nabian, represent what remains of the fortress built by Ebalo of Challant prior to the fourteenth century.
A slight distance away, with a short and pleasant walk, you can easily reach the picturesque and solitary Villa Lake, in what was once a glacier valley set among crags and green woodland, with waters that vary from grey to dark green.
There is an obvious contrast between the marshy and mountain vegetation: in fact, the lake is surrounded by a thriving bed of reeds and hosts aquatic varieties that are now rare to the Alps.
There are plenty of little churches scattered throughout the municipality. These include the church of Saint-Maxime (XII century) and the church of Saint-Préjet in Targnod, established because of devotion and public imagination. In fact, in local Patois “Predzi” means “to speak” and for this reason the saint is invoked, to whom the church is dedicated, until he heals stammering children; as a sign of gratitude a cockerel is traditionally offered.
The waterfall in Isollaz is worth mentioning.
Near the hamlet of Targnod, the Evançon River narrowly flows between the rocky walls and forms a picturesque waterfall that is among the most beautiful in Valle d’Aosta, due to its impressive effect and the particular sound caused by the movements of air it produces, caused by the speed with which the water falls.