News of the World's Columbian Exposition to be held in 1893, in Chicago, Illinois, drew Ferris to the city. In 1891, the directors of the World's Columbian Exposition issued a challenge to American engineers to conceive of a monument for the fair that would surpass the Eiffel Tower, the great structure of the Paris International Exposition of 1889. The planners wanted something "original, daring and unique." Ferris responded with a proposed wheel from which visitors would be able to view the entire exhibition, a wheel that would "Out-Eiffel Eiffel." The planners feared his design for a rotating wheel towering over the grounds could not possibly be safe.