Geograph - photograph every grid square

I found several enclosures like this in the vicinity. I was a bit puzzled as they appeared to have no entrances?

Added later: This clearly is a "planticrub", a small drystone enclosure for growing kale. I assume that the fairly high walls gave the crop protection from the strong winds, and if you just needed to get in two or three times a year, then ladders would do the job.

Apologies for the tilted image.