Marmorek worked at the Exposition Universelle (World's Fair) of 1889 in Paris, where he was duly impressed by a colorfully-lit fountain aptly called the "Fontaine Luminuese." Subsequently, he designed a scaled-down version for the park northeast of the city center between the Danube Canal and the Danube River called the Prater, where the 1873 Weltausstellung (World's Fair) had been held. The success of this project meant that he soon became one of the most sought-after exhibition architects in the city, being charged with the design of the exposition Alt-Wien ("Old Vienna"), also located in the Prater. In 1895 he was hired by the theater director Gabor Steiner to design Venedig in Wien ("Venice in Vienna"), one of the world's first theme parks, for which he was repeatedly called on to remodel pavilions whose purposes and amusements frequently changed.