For cruises of the harbour area and Chesapeake Bay, a key tourist attraction in its own right, contact Baltimore Spirit Cruises. It offers a range of lunch and dinner cruises and Inner Harbor sightseeing tours. If you have kids in tow, you can set sail on a pirate ship with Urban Pirates. Though the water taxi (www.baltimorewatertaxi.com) is more of a shuttle, it's a cheap, convenient and enjoyable way of viewing the harbour.
Spirit Cruises
Telephone: +1 866 312 2469.
Website: http://www.spiritcruises.com/baltimore
Urban Pirates
Telephone: +1 410 327 8378.
Website: http://www.urbanpirates.com