Dreaming of a castle links us to the principle of an enclosed and defended private space. Spiritually it suggests some kind of test or challenge or overcoming obstacles in order to gain greater understanding. Before we can be fully open to other people, we normally have to let down our barriers, and being trapped in a castle may highlight our difficulty in freeing ourselves from old attitudes. Trying to enter a castle signifies that we recognize that we ourselves create difficulties which have to be overcome. A castle can represent the fantastic, the unattainable or perhaps difficulty in obtaining our objectives. The castle represents the essential feminine wisdom so a woman is more likely to dream of being in a castle. A man will tend to dream of trying to enter one. You might like to consult the entries for Buildings, Camelot and Tower.