Cityside Harbor Shuttle 1 8th St Pier 6, Charlestown, MA02129 Cityside Harbor Shuttle is a provider of shuttle and mini tours to Boston Harbor. The tours are conducted through small…More vessels, with tours lasting approximately one hour. Tours depart from Tavern on the Water. About 53 seats are available by the hour. Clients can pay with cash on board or purchase tickets online throug the website. BYOB private tours are avalable upon request.