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Took this one in the summer in NW Scotland. It's not the most beautiful, but I'm a geology student so the structures you can see are fascinating.
The well-defined, straight rock unit you can see on the far side of the lake dipping to the right is the Torridonian sandstone, overlying the Lewisian Gneiss, which you can't really see.What makes it interesting is that the rock overlying the sandstone is also that same gneiss, despite it being 1.8 billion years older than the sandstone (the gneiss is 3bn years old, sandstone is only 1.2bn)
It's there because this is an excellent profile of a thrust fault - older rocks are pushed on top of younger ones because of compression, in this case two continents colliding and closing an ocean
