This poem describes Xanadu, the palace of Kubla Khan, a Mongol emperor and the grandson of Genghis Khan. The poem's speaker starts by describing the setting of Emperor's palace, which he calls a "pleasure dome." He tells us about a river that runs across the land and then flows through some underground caves and into the sea. He also tells us about the fertile land that surrounds the palace. The nearby area is covered in streams, sweet-smelling trees, and beautiful forests.