According to the Baltimore Area Convention and Visitor's Association, Baltimore City was visited by 13 million people last year. They spent 2.95 billion dollars. 

Visit http://www.ci.baltimore.md.us/ to learn more.

Over a one hundred community festivals, concerts, and events are organized yearly by Baltimoreans. A seasonal calendar of events is published by the Baltimore Office of Promotion and the Arts.

The Convention Center's web site is an award-winner with interactive floor plans and links to visitor resources such as maps and directions.

There are more attractions than even WE know about, but here's a great list to start

American Visionary Art Museum
Babe Ruth Museum
Baltimore Arena
Baltimore Maritime Museum
Baltimore Museum of Art
Baltimore Museum of Industry
Baltimore Orioles
Baltimore Ravens
Baltimore Zoo
B & O Railroad Museum
Edgar Allan Poe House
The Great Blacks in Wax Museum
Harborplace
Lexington Market
Maryland Science Center
National Aquarium
National Historic Seaport
Port Discovery Children's Museum
Pride of Baltimore II
Sail Baltimore
Top of the World Observation Level
U.S.S. Constellation
The Walters Art Museum