From Beara Peninsula, Ireland.
This is one of the dozens of ancient stone circles all over the rugged Beara Peninsula, as well as the whole country of Ireland. They were made thousands of years ago, and there are various theories as to their purpose.
There were a bunch of cows hanging out in the field with this circle, and our group was about to climb the fence into the field with them when our guide noticed a bull in there with them as well. We all backed down slowly! They kind of slowly wandered away from us so we were eventually able to approach the circle safely. You can see the remnants of the herd in the right background of the photo.