Belfast and its environs cannot be said to be very rich in monuments of antiquity. There are, however, two round towers not far from it; one at Antrim, some fifteen miles away, in excellent preservation; and one at Drumbo, in the County Down, about five miles from the city. The last is in a ruined condition--not much more than thirty feet of it remains. But Belfast can boast of the most extraordinary monument of antiquity of its kind in Ireland being in its immediate vicinity. This is the vast _rath_ known as the Giant's Ring. There is nothing in Ireland so fine as it. The _rath_ on the summit of Knock Aillinn, in the County Kildare, which has been already described in the article on that hill, is much larger, and encloses three times the space; but the earthen ramparts are not nearly so high as those of the Giant's Ring. The space enclosed by this gigantic rath is seven statute acres. When standing in the centre of this ancient fortress, nothing is seen but the sky above and the vast earthworks all around. The centre is as level and almost as smooth as a billiard table, and exactly in the centre stands a cromlech. Old men living in the locality say that the ramparts were for many years planted with potatoes. This must have reduced their height by many feet; but they are still nearly, if not quite, twenty feet high. Like most ancient raths, it has two entrances, one exactly opposite the other. It would give ample room to a population of some thousands, and was evidently an ancient city. But one of the most extraordinary things connected with the Giant's Ring is that annals, history, and legend are silent about it. So far, there seems to be no more known about those who built the Giant's Ring than about the builders of the temples of Central America. It is the same with many of the vast Cyclopean forts along the west coast, of which the Stague fort in Kerry and the forts in the islands of Arran in Galway are the most remarkable. There are, however, very few large earthen forts in any part of Ireland about which annals and history are alike silent. The Giant's Ring is by far the most remarkable structure of its kind in Ireland, and the most remarkable of all the ancient remains in the vicinity of Belfast. It has been much better preserved than most of the remains of its kind in Ireland, for the landlord on whose property it is has built a stone wall round it, so it is safe from spoliation.