Historically, the hills, combined with the town's site at the lowest bridging-point on the River Forth, led to Stirling's importance as a main gateway to the Highlands. They also acted as a boundary with Fife. Castle Campbell was built at the head of Dollar Glen in the late 15th century (an earlier castle on the site had been called Castle Gloom) mainly as a very visible symbol of the Campbell domination of the area. Sheriffmuir, the site of the 1715 battle of the Jacobite rising, is on the northern slopes of the hills. In the early Industrial Revolution, several mill towns such as Tillicoultry, Alva and Menstrie (the Hillfoots Villages) grew up in the shadow of the Ochils to tap the water power. Some of the mills are open today as museums.