Back in the old days distance stones were used to indicate to travellers how far they had to go to the next town. These days there aren’t a lot of them around and often they are found on old and back roads. But trust Geocaching to take me to one of them on the N10 on a trip to Cradock. This stone indicates 27 miles to Cradock and 80 miles to Grahamstown.
I've seen a few of these on some of my backroad adventures.