The Element Encyclopedia

by Theresa Cheung
A dream that takes place underground or under the ocean can be a symbol of the journey into the unconscious and lead to the discovery of unknown parts of yourself. This type of dream can also be a representation of the womb and of the possibility of rebirth. To dream that you live underground symbolizes a desire for greater security and peace of mind.

If you dream of a pit, you might suffer from anxieties about female sexuality. Jungians see the pit as an image of unconscious urges that need to be explored with care. To dream that you are in a mine signifies that you are getting to the bottom of a particular problem, and may have even reached its core. The journey you are prepared to take to understand yourself better might be symbolized if you find yourself traveling on the tube or the subway; the same is true of any dreams of tunnels, which generally indicate the need to explore your unconscious. Such dreams may also represent the birth canal and therefore the process of birth.

If there is light at the end of the tunnel, you are progressing positively but if something is blocking the tunnel, some past fear or experience is blocking your progress.

The Big Dictionary of Dreams

by Martha Clarke
The underground normally symbolizes the subconscious. Things that are covered, interred, or that emerge from the ground represent qualities that come from the deepest part of your personality. It could be a positive or negative dream. Digging in the ground could be frightening, but sometimes it is useful in order to know secrets and hidden truths that you would otherwise miss. Further, exiting an underground tunnel and reaching the light represents a triumph over adversity. To interpret this dream it is important to pay attention to the sensations that you feel, and to the events that occur therein.

Encyclopedia of Dreams

by Michael and Elizabeth Thiessen
If the dreamer dreams he is in a house built underground is an omen that can mean more then one thing and must be analyzed with the entire dream in mind.

The first thing it means is a chance of loss of fortune and reputation if certain aspects of daily living are not changed.

The second is a need and desire for greater security; hence hiding from life by living ‘underground’. Another would be a withdrawing from all aspects of life that may interfere with the dreamers peace of mind, or reluctance to make decisions.