The three Lakes of Killarney are separated by two narrow channels with bridges over them. The gap between the Upper and Middle Lakes is quite narrow, and the water is quite turbulent.
Back in 1998 the guidebooks and web sites all went on about "shooting the rapids under the bridge", and how it took nine men to haul the boats back up in the days before outboard motors. I donʼt know if the channel has been widened, or if it doesnʼt seem like such an adventure now that weʼve all been white water rafting down the Nile, but there doesnʼt seem to be any mention of it now.
The journey continues across the Middle Lake and into the wide expanse of Lower Lake, until eventually you round a corner and there is Ross Castle, and the coach waiting to take you back to your starting point. Or not in our case, as the chap was still digging up the road in Killarney, and everything was at a standstill.