Aosta is the main city of the region. It was founded by the Romans in 25 BC and still boasts beautiful monuments from its origins, such as the Roman bridge, the Arch of Augustus, the theatre and the Roman walls. Not surprisingly, it is also called the "Rome of the Alps". From the Medieval period: the monumental complex of Sant'Orso, with the Romanesque bell-tower, the cloister, the priorate and some frescoes are worth a visit, and the cathedral, with the museum of the treasure and the wooden carved stalls.
Fénis on the left side of the Dora is dominated by the medieval castle , built in 1340 by Aimone di Challant. Restored at the end of the 19th cent., it is surrounded by crenellated walls and towers, you can admire the inner courtyard, the semicircular staircase , the chapel and the frescoes from the 15th century, which are authentic masterpieces of international Gothic art.
Nus is especially known for the production of Malvoisie, one of the most appreciated white wine of the Valley.
At Sarre you can visit its castle bought in 1869 by the king Vittorio Emanuele II of Savoy and transformed as a hunting residence: the internal hall is decorated with hundreds of trophies of ibexes and chamois.