When I was younger, I had several recurring nightmares of a room in my basement (the room did not exist in real life). In the first few dreams I would usually be exploring this room, which led deeper into the ground and seemed to be never ending -- it led from room to room, connected by tunnels and ventilation ducts, the rooms varying from abandoned experimental laboratories and dusty old graveyard-like tombs. I remember as I explored further and further into the labyrinth, voices would start to whisper. There would be several voices, some ushering me forward while others told me to go back to safety. The voices would whisper and say things that terrified me to my very bones, and eventually led to me waking myself up with a sense of evil and the fright of impending calamity.
Now, I think I was a lucid dreamer since I was very young, because I had the last of these dreams in Sophomore year. They stopped after one dream I had -- it was a typical chase dream, where I was being chased by some insane killer. I ran into my house, and into the basement where I could hide. When I ran into the basement, I turned right (which, you cannot turn right in my basement. There is just a wall. The basement leads out to the left of the staircase.) and I nearly ran to hide in "the room." Before I went into the door, however, I stopped myself, even with the killer just behind me, and said, "oh, this isn't where I want to go.." and I turned right around and found another hiding spot. When I went to school that day, I told the dream to my friend at lunch. (I had never told the basement dreams to anyone. For some reason I know about them, but I never shared them.) After telling her about the dream at lunch time, I have never had a dream about "The Room in the Basement" again.