Movies...

So I'm not sure if you would consider this controversial but I didn't know where else to post this. It's driving me insane that I can't think of a certain movie so I'm asking you guys to help me. The movie I watched was like a kids movie, a girl is walking in the city and she goes into a subway and is told she has to solve riddles to get out of the subway. It's very foggy. It's a very weird movie but it's act really good.