One exhibition space that stood out to me was the Georgia Aquarium. I think the main reason it left a lasting impression was because of how immersive it was. The ability of an exhibition space to temporarily transport you into a different reality is both unique and powerful. The picture shown below is a great example of this. By enclosing you in a glass tube, you feel like you are actually in the water.
Another exhibition space that I remember clearly is the American Museum of Natural History. By having several gigantic displays like the one shown below, it really stimulates the imagination of the visitors. The shear size of the display shown below also helps the visitor more clearly understand just how big these dinosaurs were. Therefore, the realistic nature of these displays is quite important.