Hours: Architectural cruises depart daily at 10, noon, 2 and 4, late Mar.-early Dec. (also Fri.-Sat. at 11 and 1, late May-late Aug.). Cocktail architectural cruises depart Mon.-Sat. at 6 p.m. and 8 p.m., late May-late Aug.; Fri.-Sat. at 6 p.m., late Aug.-early Oct. History cruises depart Fri.-Sun. at 3, late May-late Aug.