Possible Meanings Of Underground In Dreams
To dream of going or living underground can indicate that you are trying to force certain thoughts and issues into your subconscious mind. You really need to confront and explore your unconscious. Alternatively, the dream may suggest that you are expressing a desire to go unnoticed or to lie low.
To dream that you are riding in an underground railway may signify anxiety and distress arising from a peculiar situation.
Oracle Dream Interpretation