Realdo (Reaud in Occitan, Rêaud in brigasco, Reaudu in Ligurian) is a fraction of the municipality of Triora in the province of Imperia, is located in Valle Alta Valley Argentina on the border with the French Val Roia. Until the Treaty of Paris was in Piedmont in province of Cuneo as a hamlet of Briga Marittima, and then move on to Liguria.

It is the Ligurian part of the “brigasca” enclave, which is the center of a cross-border area within the region called the Mediterranean Alps.