Dyado Stoyanova Vodenitsa (en: Grandfather Stoyan’s Mill) near Sopot is one of the places connected with the Bulgarian past, which have historical, sentimental, and romantic value. It is in the memory of every child who has already read "Under the Yoke" and every adult. In the town of the Patriarch of Bulgarian literature, it is also called Boycho's Mill after the main character in the novel Boycho Ognyanov, who saves the granddaughter of the miller, grandfather Stoyan, from the Turks. This is the only surviving karadzheyka (small mill driven by water) from more than two centuries ago.