
The Paris Aquarium is not only Europe's oldest aquarium (it was built in 1867), it was also Europe's largest for years. Housed in the center of the city – right next to the Eiffel Tower – on the quarries where Napoleon would house his cavalry, this institution has been part of the fabric of Parisian life for more than a century. With 4 million liters of water, and 13,000 fish from around the world, there's plenty to keep you and your family entertained here for hours on end.