Scotland's First Frontier: Exploring the Old Forth from Aberfoyle to Stirling

Rising from the dark, peat-stained waters of the Trossachs near Aberfoyle, the upper River Forth winds eastward through one of the most storied and contested landscapes in all of Scotland. For millennia, this stretch of water - barely thirty miles in length - has served as something far greater than a river. It has been a border, a battleground, a threshold between worlds.

When the legions of Rome marched north into Caledonia, it was the Forth that checked their ambitions. The Romans underst...