One of the finest points of view is the centre of the new iron bridge, comprising the castle, the vessels at anchor under the stupendous wall of rock on which it is erected; with the lawns and groves of Piercefield--a favourite and familiar name in the list of picturesque tours--closing the landscape. The former bridge[3] was of prodigious height, erected on piles. The present structure was founded in 1815; and in the March of that year, the tide rose from low-water mark to the remarkable height of _fifty-one feet_ two inches. The new bridge consists of five arches, the centre one of which is one hundred and twelve feet in span; the two adjoining arches have a span of seventy feet, and the two outer ones a span of fifty-four feet each. It is of massive cast-metal, resting on stone piers; and its total length is five hundred and thirty-two feet. The depth of the moorings in the river here is so great, that, at low water, ships of 700 tons burthen may ride safely at anchor. The rise of tide is from thirty to nearly sixty feet, a circumstance scarcely to be paralleled--and caused by the extraordinary swell of water at the rocks of Beechley and Aust, which, by protruding far into the Severn, near the month of the Wye, obstruct the flow of tide, and thus impel it with increased rapidity into the latter.[4] In January, 1768, according to our local guide, it attained the height of seventy feet: its greatest rise of late years has been fifty-six feet. In 1634, we are informed, Colonel Sandys attempted to make the Wye navigable by means of locks; but after much labour and expense, the experiment failed, and the locks were removed. Every one curious in the phenomena of natural history, has heard of the intermitting well of Chepstow, which ebbs and flows inversely with the tide--that is, when the tide ebbs, the well flows; and when the tide flows, the well ebbs: when the tide is at its height, the well is nearly dry; a little before which it begins to subside, and soon after the ebb it gradually returns. It is neither affected by wet nor dry weather, but is entirely regulated by the tide. It is thirty-two feet in depth, and frequently contains fourteen feet of excellent water.