I'm pretty sure I heard they were going to Belgium too, but a lot of the dialogue flew by, so it could have been Alsace.

This is the only article I could find: http://narrative.ly/how-the-fiercest-warrior-in-wonder-woman-kicked-her-way-into-hollywood/

I remember another one about the group strength training, but I think it was on tumblr, so never see it again now.