"Helicoid geochronograph"@en . "The helicoid geochronograph is the water-powered spiral clock inside the great globe at Waterfall City. It combines the concept of linear and circular time, showing that while there are cycles in life, time does go on."@en . "The helicoid geochronograph is the water-powered spiral clock inside the great globe at Waterfall City. It combines the concept of linear and circular time, showing that while there are cycles in life, time does go on."@en . . . .