Northern China
From Tardis Wiki, the free Doctor Who reference
Northern China, also known as Cathay to some European travellers, was visited by the First Doctor, Susan Foreman, Ian Chesterton and Barbara Wright in 1289, when they journeyed with Marco Polo through the Gobi Desert to Peking, later known as Beijing. (PROSE: The East of the Earth [+]Loading...["The East of the Earth (feature)"], TV: Marco Polo [+]Loading...["Marco Polo (TV story)"])
