Postcard from Fairmount Park in 1948 Paul Lundgren 6 years ago This postcard of Duluth’s “municipal zoo,” now known as Lake Superior Zoo, was mailed 70 years ago today — Sept. 8, 1948. Recommended Links:Postcard from the Municipal Zoo at Fairmount ParkPostcards from the Arrowhead BridgeThornton’s Kiddieland: Amusement at Lake Superior ZooUpdated concept plan for Lake Superior Zoo