The Blue Planet, National Aquarium Denmark, Kastrup, Denmark

Old aquarium
Denmark's Aquarium in Charlottenlund started construction in 1937 and was opened in 1939. In 1974, this aquarium was expanded to feature five large landscape aquaria and a biological museum with theme-based exhibits and aquariums. In 1990, the facility was further expanded by a new front hall, café, improved toilet facilities and a schooler service. In the final years before the closure of the aquarium in Charlottenlund, it had about 1,000,000 litres (220,000 imp gal; 260,000 US gal) of water in about 70 aquarium tanks.