The Paris Aquarium (also known as Cinéaqua) is a world class festival of the sea. One of the oldest aquariums in the world - it was built in 1867 -, it has more than 13,000 creatures who call its depths home. Featuring mermaid shows, an aquatic cinema and a shark basin stacked with the apex predators, this is an incredible way to add a deep blue dimension to your trip to the center of Paris.