i feel that too, malls, supermarkets they just make me feel dizzy and it makes me anxious being in crowded space..Even though I didn't spend much time inside the Galleria but I was very much impressed by this grand architecture, especially the dome..
just have a peek inside if you plan to be on that side, or go really really early when everything is closed and not crowded.. to just admire the interiors. hehe
Love.Swati