There are three reasons to visit the far north of Scotland. The first is because you are going to Orkney, the second is because you have just caught the Far north train line from Inverness and spent the four hour journey enjoying some beautiful unspoilt views of highland wilderness, and the last is because you have just been to Lands End in Cornwall and want to travel the length of the country - the famous northerly village of John O'Groats and the nearby point which is actually the most northerly place in the UK are both located in Caithness. Either way, it's a nice enough place to spend a night or two, though probably not worth any more of your time.