Underwater train and Underwater Mall

i had this dream last night it wasnt that detailed but here it goes , i was in NYC me and my cousin and some of my friends was there to. We where at my cousin house but for some reason his house looked like a hotel room in the inside and we were about to go to the mall i dont know how but we ended up on a train and we where riding on top of the water and then the train started to go underwater i dont remember any tracks but when we got to the station that was underwater the mall looked like a jail for some reason you had to tell the guard to open up the gate so that you could go inside of a store, all the stores were long and rectangle shaped i dont remember what was inside of the stores

That sounds awesome actually! I'm guessing it wasn't a lucid dream? Once I get good at lucid dreaming I want to explore underneath the ocean in one!