Optional Task about GLOBALIZATION

We have learnt what globalization and multinational companies are. In your portfolio, you had included some international logos that can be found in any malls. That is the reason why malls stand for the inargueable symbols of our global world.

I would like you to look for information about malls. Some suggestions to gear your search:
Malls in countries like Dubai.
Which is the biggest  one in the world?
Which is the biggest one in Spain?
Weird, different malls around the world.