Duck tours, or DUKW tours, are tours that take place on purpose-built amphibious tour buses or military surplus DUKWs an LARC-Vs. Primarily offered as tourist attractions in harbor, river and lake cities, such as Chattanooga, Pittsburgh, Baltimore, Washington, DC, Memphis, Boston, Miami, Seattle, Wisconsin Dells, Liverpool, London, Singapore, and Toronto. One well-established tour operator in the United States is Ride the Ducks.