The Falls of Leny are a series of cascading waterfalls that force their way through a narrow gorge before tumbling down the boulder-strewn ravine.

The waterfalls are on the course of the Garbh Uisge (which means "rough water"), otherwise known as the River Leny, which drains Loch Lubnaig in the Loch Lomond and Trossachs National Park. They occur where the river crosses the Highland Boundary Fault.

The name Leny may be of Gaelic origin, and it is thought to have derived from the word lanaigh, which means "boggy meadow." Not far from the falls is the Pass of Leny. For hundreds of years, cattle were brought to this narrow point to be herded through, an important gateway between the Highlands and Lowlands of Scotland. These regions each have unique landscape features—the Highlands are dominated by craggy mountain ranges while the Lowlands are characterized by rolling hills and moors. 

This stunning waterfall is best seen after a few days of heavy rain when the water powerfully cascades over the rocks sending spray up into the air and roaring sounds into your ears.