Janet, bird watching during a break from the rain. Our drive from Oban to Spean Bridge was very wet -- but, along with Dunstaffnage Castle, there were plenty of mostly-indoor activities along the way. We visited the "Hollow Mountain" power station at Ben Cruachan., which has two nifty features; the first is that the turbines and operation rooms are all buried inside the mountain, and the second is that it operates what is essentially a battery: during periods of low power use, excess power in the wires is used to pump water from Loch Awe to an upper reservoir, formed by a dam. Rainwater tunnels have also been built through the mountains to funnel rain into the reservoir. Then, during periods of high power use, the water in the reservoir is used as normal hydro power.