Here are some links for Baltimore area sites:
(The last three are not in Baltimore, but I've included them due to the lighthouses they include.)

Baltimore Maritime Museum (Seven Foot Knoll Lighthouse and Lightship Chesapeake)
USS Constellation
National Historic Seaport of Baltimore
Fort McHenry National Monument and Historic Shrine
The National Aquarium in Baltimore
B & O Railroad Museum
Babe Ruth Birthplace & Official Orioles Museum

Chesapeake Bay Maritime Museum (Hooper Strait Lighthouse)
Sandy Point State Park (view of Sandy Point Lighthouse)
Calvert Marine Museum (Drum Point Lighthouse)

FrankB

[This message has been edited by FrankB (edited 02-26-2001).]