This might suprise you but one of the most well known interpretations of Coleridge's Kubla Khan is of it being about sexual intercourse. e.g "that deep romantic chasm which slanted down the green hill athwart a cedarn cover!", "...fast thick pants were breathing, a mighty fountain momently was forced" etc (I do not use this interpretation btw. I use the journey without reading in between the lines that way
)
*Runs upstairs at 1am during the holis to get notes for a random*
*Notices I was too lazy to make notes on it ><*
About Coleridge's texts being representative of imaginary journeys I truely hate. The most straight forward poem of his representing journeys in a clear and straight forward fashion is "The Rime of the Ancient Mariner". So if you need to choose a text and you don't understand fully understand the meaing to a really high level don't use it!
*The most superficial journey is the journey into his text and the imaginative world created.
*Mini-journeys in the text, "..through wood and dale the sacred river ran". An interestin interpretation of that in relation to the intercourse one is that the sacred river was the fallopian tubes and the sperm travelling through them. But you will find your own interpretation of the poem so do NOT adapt your mind to see it this way.
Essentially Coleridge, through the writting of his dream, brings to responder into the text and involves them in his imaginary world and ends essentially saying that if he could describe what happened people wouldn't believe him. So mostly you are looking at the joruney into the text and through the text.
These are off my head only making reference to the poem (i.e no notes) but its sufficient I guess but you need to hear what your teacher has to say about it.
Hope this helped!