In Fredville Park in Nonington, in the county of Kent in England, we are looking for the Fredville Oak, which by connoisseurs is considered to be the most impressive oak in Great Britain. It is one of the thickest oaks of the United Kingdom as well as a non-headed tree (a so-called 'maiden oak') with a rather long trunk and a large top. In the early twentieth century a huge branch broken off at 3 to 4 meters height on the South side of the trunk. Since then a huge hole yawns on this side, enabling one to cast a glance into the completely hollow trunk, as if it were a dark cave.