Gleaston Castle dates back to 1325 and the de Harrington family who lived there for over one hundred years. The castle and estate passed to Lord William Bonvilla and eventually by marriage to Thomas Grey, great-grandfather of Lady Jane Grey, under whose ownership it quickly decayed. It is rumoured that Lady Jane Grey visited the castle shortly before she became Queen of England. Today, the castle is little more than a ruin and visitors are advised not to enter and look around, in case of accidents.