Visitor Information -- Call the Baltimore Area Convention and Visitors Association at 100 Light St., Baltimore, MD 21202 (tel. 877/BALTIMORE; www.Baltimore.org). BACVA has all sorts of information to help you plan your trip, including maps, brochures, and water taxi schedules. In town, a sparkling new glass and steel building with a wavy roof has replaced the old gray trailer. It's located between Harborplace and the Maryland Science Center. While you're there, pick up a copy of the Baltimore Quick Guide, a purse-size guide to events in and around the city.