Salardú is the capital of the Naut Aran region, in the Arán Valley.
It is located at 1,268 metres above sea level, at the convergence of the Garona and Unhóla Rivers. The village was fortified in the Middle Ages on account of its strategic position. The castle once stood in the upper part of the village, where there is now a church. At the centre of the old part is Plaza Mayor Square, where there is a pretty fountain from the 18th century.