16th World Science Fiction Convention , also known as Solacon , was held August 29 – September 1 , 1958 , at the Alexandria Hotel in Los Angeles , California , United States . Solacon was physically in Los Angeles , but ( by mayoral proclamation ) technically in South Gate , California , to fulfill their longtime bid slogan ( since 1948 ) of " South Gate in ' 58 . " Superfan Rick Sneary had a cardboard sign at this convention that read " We 'll do it again in 2010 " that he carried to numerous future Worldcons . His death in 1990 laid that dream to rest and the 2010 Worldcon happened in Melbourne , Australia
2010 Worldcon
68th World Science Fiction Convention
16th World Science Fiction Convention