A friend of mine asserted that the Harry Potter and the Forbidden Journey ride in Universal’s Islands of Adventure is in the largest show building in the world. That didn’t seem right, so I pulled out my phone and Google mapped to prove what I thought – that the Revenge of the Mummy building at Universal Studios is bigger. Later at home, I decided to compare some other theme park buildings at the same scale. I hope you find this collage as interesting as I do.