John O'Groats

The thing I learned today is that John O'Groats is a village on the northeast coast of Scotland.  It is mentioned in the phrase "from Land's End to John O'Groats," meaning a great distance, as the distance between those two towns (875 miles) is the longest distance between two inhabited points in the UK.  It is named for Jan de Groote, a Dutchman who settled there.