Dream landscape

For most of my adult life (from the age of 15) I've worked backstage in the theatre. In the summer of '98 my back was badly injured in an accident during the get-out of WNO's la Traviata. By the autumn of 2000 I was in an awful lot of pain and was no longer able to work at all.
I still suffer from chronic lower backpain, and can still no longer work.
But I still dream that I am working backstage and building sets that are sometimes even more bizarre & unlikely than the ones I used to help build when I was still touring with the aforementioned opera company!
On the few occasions when I am not being a stagehand in my sleep I quite often go to a place that has a (for me) instantly recognisable topography.
Sometimes I am travelling on a train, and the train goes across a large area of fields among some hills before crossing a gorge (not unlike the Avon Gorge) on a high bridge.
There is also a fantastically tall building which I have ascended in a terrifying transparent lift - right to the top. I don't know how high it is, but it is always quite daunting. There was another time that I was dreaming of travelling on a train and, looking out of the carriage window, I could see the tower in the distance.
Another feature is a huge rock - a bit like a small mountain. In yet another dream I was wandering through a valley road with someone and, stopping to indicate a large rock to my companion, I can recall telling him that I often dreamed of a rock similar to this one, adding: "Of course, the rock in my dream is much larger than this." When I awoke after this dream I did think it funny.
Some years ago I dreamed that I was in a hospital - as a patient. The truly strange thing about it was the fact that I woke up twice during the dream, and both times I returned to the same dream. I wasn't scared by the dream while I was experiencing it, but when I thought back to it afterwards I realised that it had been quite an awful nightmare. I won't describe it here, but if we ever meet ask me to relate it to you.