Smoo Cave is one of the most popular stops on Scotland’s NC500 route. The enormous sea-cave is thought to have got its name from the Norse word ‘smjugg’ or ‘smuga’, meaning a hole or hiding-place. This staggering natural wonder is pretty unique, not only is it one of the largest natural sea caves in the UK, but it also has a rear chamber created by an underground freshwater stream. We made this the first stop of the day after an overnight stay in Bettyhill (a scenic one-hour coastal drive East of Smoo Cave). Give yourself at least an hour if you want to just explore the main chamber of the…