One of the most celebrated "beach trails" in the Outer Hebrides is that of the west coast of Harris. Take the west road out of Leverburgh; the first beach you will come to is this one:
This is the beach overlooked by the village of Northton. When the tide is fully out, you're left with a huge expanse of sand. In previous times - and during displays and emergencies in more recent times - planes landed on this stretch of sand.
Stay on the "main" road and head gradually north, then other beaches, such as Scarista and Luskentyre come into view. If you do this on the coach, then you often get a personal commentary from the driver.
Thanks to Flickr user Dowens for this picture.