What can be said that has not already been said about Hadrian's Wall: A marvel of Roman ingenuity, a UNESCO World Heritage Site, the last frontier of the Roman Empire. A stretch of 73 miles of stones from sea to sea, covering the entire width of the island of Britannia, from Wallsend on the River Tyne in the east to Bowness-on-Solway in the west. A Wall up to 15ft. in height and 6 ft. deep with large forts and smaller mile castles with intervening turrets. It took six years of work by skilled Roman legionary masons, along with thousands of auxiliary soldiers, to build. Upon its completion, the Wall was fully manned by almost 10,000 Roman soldiers to protect the Roman province of Britannia, Imperial Rome's final province and frontier, from the barbaric Caledonians of the north.