To see vistas of green valleys with pleasant streams running through them show that you are embarking on a wonderful change that will bring you only happiness and much peace.
To see a barren or marshy valley denotes losses and reverses entering your life and you should take steps to guard your assets.
To dream that you are in a valley, symbolizes your need to be sheltered and protected.
If you are entering a valley, then it is analogous to your issues of death and dying. The death may also mean an end to something in your life.