Rising on a cliff beyond the flat fields east of North Berwick, Tantallon Castle is a substantial ruin defending a headland with the sea on three sides. The red sandstone is pitted and eaten by time and sea spray, with the earliest surviving stonework dating from the late 14th century. The fortress was besieged in 1529 by the cannons of King James V (1512–42). Rather inconveniently, the besieging forces ran out of gunpowder. Cannons were used again, to deadlier effect,
in a later siege during the Civil War in 1651. Twelve days of battering with the heavy guns of Cromwell's General Monk greatly damaged the flanking towers. Fortunately much of the curtain wall of this former Douglas stronghold, now cared for by Historic Scotland, survives.