Dreaming about walking inside a dark tunnel means youre acting blindly, which will bring bad results in everything you are doing. To be inside a tunnel while a train is speeding inside it, announces disease or an important change in life. To build a tunnel means enemies, competitors or rivals are conspiring to harm you. Looking inside a tunnel without entering it, means that you will receive proposals for doubtful legality issues. Symbolically, the tunnel is a channel of communication, dark and gloomy, between two areas of clear light. That is the reason why the tunnel is usually associated with initiation rites and birth. The tunnel exit represents the maternal vagina.
Read more about dreaming of Tunnel in other dream meanings interpretations.