Beginning on May 10, 2008, Seadog Cruises will offer speedboat cruises (high speed sightseeing tours) on the Potomac River departing from a new dock at National Harbor, Maryland near Washington, DC. Seadog will offer a 45-Minute Speedboat and Sightseeing Tour including informative descriptions of notable DC area landmarks such as Old Town Alexandria, the Wilson Bridge, Jones Point Lighthouse, Ft. Washington and Mount Vernon. Read more about the new Seadog Speedboat Sightseeing Tours.