 It is the main ferry port to Sherkin Island, Cape Clear Island and the eastern side of Roaring Water Bay (Loch Trasna) and Carbery's Hundred Isles.Although the name "Baltimore" is an anglicisation of the Irish meaning "town of the big house", the Irish-language name for Baltimore is that of the O'Driscoll castle, "Dún na Séad" or "Dunashad" ("fort of the jewels").The restored castle is open to the public and overlooks the town.