Complex sentence: A room decorated in the style of the study of Captain Nemo in the Nautilus, it is an observation room in a huge pool of, among the largest in Europe, where most of the Atlantic fish on display swim.
Split into simpler sentences: A room decorated in the style of the study of Captain Nemo in the Nautilus. It is an observation room in a huge pool of, among the largest in Europe, where most of the Atlantic fish on display swim.