Hey man I've had about 50+ lucid dreams and well what usually works for me to change scenery in dreams is I imagine a picture of the place I want to go behind me and I then turn around and see the picture. I then proceed to jump into the picture and bam I'm in the new area. The important thing to remember here is that you have to believe you can do it or you'll just hit the picture and fall. Possibly even wake up. Good luck and you may not get it your first try just persevere and you'll get there!