The Sath'har Archipelago was one of the largest archipelagos on the planet Romulus, the others being the D'vrex Archipelago and the Uulmar Islands.
History and specifics[]
It was located between Follos, Valcaria and Umrika, in the eastern Apnex Sea. (Last Unicorn RPG - The Way of D'era: The Romulan Star Empire module: The Romulans)