Harry and Ron Find the Train

In this model, I tried to recreate the scene where Harry and Ron find the train, but I took a few creative liberties. Instead, I built a large mountain, with a tunnel going through it, continued on to a bridge. Then there is a flowing water fall, which flows into a river, and there are rolling hills and flower fields. Then, there is the iconic flying car, and of course the Hogwarts express, with three coaches behind it, and a steam pipe that is billowing steam. Finally, the hidden number 20, can you find it?