Ulster is the most Northern of Ireland’s ancient kingdoms. Its landscape is fabulously beautiful – it has towering cliffs and rocky hills, winding rivers and scooped-out lakes that look like they could have been made by the hands of slightly crazy giants. There are many stone tombs here, five thousand years old, made of enormous boulders that could not possibly be lifted by one man, or even a whole family of ordinary men. For many years the local people have named them “Giant’s Graves”