Shedd Aquarium in Chicago

About

Once, it was the largest indoor aquarium in the world. It's unique because it's housed in a neoclassical marble building, creating a contrast between strict architecture and wild nature. The main area is the 'Abbott Reef,' where sharks, rays, and sea turtles swim in a huge cylindrical tank. In the 'Polar Play' zone, you'll find charming belugas and penguins.