AquariumMareNostrum Nostum Marine Aquarium is the largest indoor aquarium in Europe. Officially opened in 2007 and expanded in 2011. Giant octopus models, hurricane simulators, and three-dimensional movies are very popular. Open from September to June 10:00-19:00, July to August 10:00-20:00. Tickets adult 15.5 euro, 5-12 year old 10.5 euro, free for under 5 years old. 1 bus PlacedeFrance stop.