Zodiac originally opened at Kings Island in Mason, Ohio, USA in 1975. According to Thomas Fry, a park official, a Ferris Wheel was one of the most requested rides in customer surveys. Fry stated that the park had not purchased one as they a relatively low capacity of 300 riders per hour, compared to an expected capacity of over 2,000 for the new Double Ferris Wheel. The attraction was referred to as Giant Double Wheel its first year, before being identified as Zodiac from 1976 onward.
Zodiac operated at Kings Island through 1986. It was disassembled in early 1986 and later relocated to Wonderland Sydney.
Zodiac opened within the Transylvania section at Wonderland Sydney in 1989. It operated through 2004, then was removed in 2005.