Hope it`s not too late.
Baltimore就去Harbor走走,
other than that, Baltimore is a pretty boring place.
Annapolis is a boring place, too.
However, D.C. is a different story.
你可以去逛museums,
most of them are free.
National Air & Space Museum and National Museum of Nature History are must see.
Then you can go check out the Lincoln memorial and the Washington Monument.
The white house is pretty boring because you can only see it from far distance behind fences, but it`s still a popular attraction. :)
Then there are the dupont circle and georgetown which are fun to stroll around.
Don`t go to federal triangle. It`s a very boring place with nothing to see.