Door 
To dream that you are entering through a door indicates fresh opportunities that you will encounter. You are moving into a new chapter in your life and to a different level of consciousness. A door that opens to the outside represents your desire to be available to others more. A door that opens inward suggests your wish to have self-realization or internal discovery.
To dream about opened doors represents your ability to take on new thoughts and ways of doing things. To see light behind the door indicates that you are on the path to better spiritual faith.
To dream about locked doors indicates that you have either been denied chances or that you have missed them. If you are on the outside of a locked door, then you may possess some characteristics that others would call anti-social. If you are on the inside of a locked door, then you must accept the knowledge of a difficult lesson.
To dream that you are locking doors indicates that you are shutting yourself off from others. You have difficulty letting people get to know you and this is significant of a halt in development or maturity.
To dream of revolving doors indicates that your life is simply moving in circles and nothing is moving you forward. You could be sensing that your choices are going nowhere.
Door Knocker
*Please see Knocker.
Walls
To dream of walls indicates that you have obstacles in your path. You options are somewhat limited. You, or some external force, are blocking your progress. This may be as simple as self-limitation due to relying on old patterns and ways of thinking.
When you dream of yourself jumping over a wall, it foreshadows a solution to your obstacles. You will soon remove the barrier in front of you.
When you dream that you have broken down a wall, it is a subconscious memory of a childhood trauma or an indication that a current relationship is souring. It may also be an indication that you have realized there are boundaries in your life and that you are comfortable with them.
When you see yourself hiding behind a wall, your subconscious is showing you that you are ashamed of yourself, your behaviors, or of friends or family.
If you are thrown at a wall, it is an indication that it is time to find a way to remove the walls that are limiting you. Consider finding a way to explore your surroundings and possible solutions to your waking life problems.
Boxcar
To dream about a boxcar or cable car foretells that you will earn enough money to live as you wish.
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