I came across this photograph on Ancestry this afternoon...only included because it's situated in a little town where some ancestors originated from.
Guessed what it is yet?
It's a Lock-Up or Blind House dating from the 1700's where miscreants were put if they were drunk or caught committing a minor crime...
Although those stones look 'modern' they date from the time the building was erected...but they've been sand-blasted and restored by a local stone mason...the door is the original.
Inside is a narrow wooden bench to either sleep or sit on, and an earth closet or toilet...
There are many of these little buildings in English towns...now deservedly being restored and preserved and protected by English Heritage.

The animal Pound was another common feature of almost all villages and small towns...not the same as the horrible dog pounds of nowadays...these were for straying farm animals. Just a small securely fenced area where the animals were kept until claimed by their owners...there was a small fine to pay to release your cow or donkey mind you. We had a Pound in our street here...it was just behind Paddy's cottage, though there is no evidence of it nowadays.

I've no idea whether Ireland had Lock-Ups or Blind houses though...I've never knowingly seen one. They were called Blind Houses simply because they were virtually pitch dark inside, apart from a tiny window over the door which wouldn't have let much sunshine in...and they must have been awful cold to spend the night in...especially in the middle of winter.

The Heytesbury Lock-Up is used every year on November 4th to lock-up the effigy of Guy Fawkes overnight...then he's taken out on the 5th and put on the towns bonfire...