A fleet of Ducks, brightly colored, vintage World War II amphibious vehicles provide narrated, half-land, half-water tours of Boston. Do not be alarmed when your Duck abandons its wheels and lowers itself onto the Charles River! Tours cover many of Boston's downtown tourist attractions famous spots like the State House and the Prudential Tower. Keep in mind, Tour guides encourage quacking! Tickets sell out quickly, especially on summer weekends. So go and quack away with Boston Duck Tours.

Source:http://travel.yahoo.com