To dream that you are visiting a zoo indicates a loss of your freedom. It further symbolizes that your talents and abilities have gone unnoticed. You may feel that you or an aspect of yourself is caged in.
Conversely, a zoo may indicate confusion or chaos in your life. This feeling is exemplified by the saying 'this place is a zoo!' Consider what aspects of your life may need to be straightened out.
To dream that you are visiting a zoological garden means you should look to succeed at a business venture by adhering to your ethics.