For what it's worth, it would seem like a major setting in the film is going to be MACUSA (The Magical Congress of the United States of America). Which is just the US Ministry of Magic. Like the UK Ministry, it is hidden beneath another building. In the case of MACUSA, it is housed in the NYC Woolworth building. The characters in the film walk through the Woolworth lobby to access the entrance to MACUSA.
I could see the Woolworth entrance replacing either the main Mummy museum facade or the rerouted entrance since it already has a similar arch.