"Loch Dionard, below Foinaven, watercolour, 24 x 36 cm
For lovers of wild landscapes, there can be few places in Scotland better than North-West Sutherland. The rocks here have been dated to 3 billion years old, and whenever I visit this area I am aware of a sense of both great age and timelessness. A human lifespan is tiny compared with geological time, and so the landscape seems to be unchanging. And yet we can see how the rocks have been thrust up and folded, and then worn away by glaciers, in a process that seems almost incomprehensible. It's a place for allowing the mind to wander and wonder.