“Wicked fast and wicked fun” is what Bostonians say about the city’s most exciting summer attraction. The thrill boat takes you on a heart-pounding, turbocharged cruise across Boston Harbor at speeds up to 40 mph and performs aquatic aerobics, including 360-degree spins and S-turns. You will get wet! Departs May 7-Oct. 11 noon-6 pm on the hour. Tickets: $25-29.