Bryn Cythraul
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Bryn Cythraul was, according to Lowri Palin, the name of the cliff above Glyngatwg on which there was a fairy circle that was stepped on by the Fifteenth Doctor. (PROSE: 73 Yards [+]Loading...{"page":"40","1":"73 Yards (novelisation)"})
Behind the scenes[[edit] | [edit source]]
"Bryn Cythraul" translates from Welsh to "demon hill".