I love the Wild Reef exhibit at the Shedd Aquarium. It's setup with a tall, bowed wall so that visitors have the vantage of a diver, which is what I like to imagine when I'm down there.
Photo Nerdery: They don't really light these spaces for photography. I can only imagine how many blurry, partially-reflected photos are taken in aquariums. If you're looking for a tip, stand as close to the glass as possible. And don't use your flash, that's both cruel and ineffective. [Canon 1Ds3, 35L, 1/125th, f/1.4, ISO 1000]