Pavor Nocturnus
In the ocean, put on scuba gear and had to swim up a flat wall surface of a tunnel into the depths of the sea. It was dark and there were strange creatures and slimyness along the walls accompanied with brittle coral. I went so far up, I got to the first room and was able to take off my gear. I was trapped in another world that I couldn't get out of. I knew I wouldn't be able to go back because the people in this place wouldn't allow me to.They took everyone who came up. I had to play their games and pretend to live their lifestyle so they wouldn't notice I was secretly trying to escape. I escaped sometime later and went further into the depths, to my dad's house which had a locked door only opened with a type of screwdriver that I didn't have, it was in the furthest part of the ocean, and everyone knew about it but no one could get in.. Once I got inside it was lavish architectural house with many rooms and crevices. There was a man on the top balcony laughing at me, sitting on the edge of a second floor room with no walls or railing.