Just inside the Ticket Plaza, the visitor is greeted by the Harvey Water Clock, a unique contraption that one could watch and study transfixed in amazement. The clock is operated by water from the Water Tower behind it. The water travels down to a fly ball governor which regulates a steady supply of water and turns a water wheel which in turn operates the gears to register the hour, day, month and year. The Harvey Water Clock was patented in 1798. This is first one of its kind in Georgia. The Water Tower also feeds water down a long and intricate series of overhead wooden aqueducts (not modeled) leading to other parts of Crossroads park. Zoom in close to see how it works.