The falls were probably formed some time in the last 10,000 years, after the retreat of the glaciers at the end of the last ice age. The waters slowly cut through the rock which had been pushed up by the geological forces which formed the Scottish Highlands some 500 million years ago. The layering of the rocks means that the water has cut a meandering path through the softer rock and left the harder rock untouched. This has led to the creation of deep pools, outcrops and, in one place, a natural arch. The falls consist of two large falls and a number of smaller drops. The water is often coloured brown from the peat through which it flows.
Nowadays, the A9 Perth to Inverness road passes near the foot of the falls in Glen Garry, and there is a shopping centre and car park from where visitors may access the falls. A circular footpath leads up to the Lower Bridge, close to the natural arch, and continues on to the Upper Bridge, about 1/2 mile from the car park, before returning down the opposite bank.
The total drop of the falls is about 60 metres. The narrowness of the gorge means that the falls are most impressive after heavy rain, but since the construction of a hydroelectric power scheme in the late 1940s, water is extracted farther up the river and the falls no longer reach the volumes they once did. ( Wikipedia : http://en.wikipedia.org/wiki/Falls_of_Bruar)
