If you are going to go see the Orioles, you might a well make a day of it. D.C.’s neighbor to the northeast is very accessible by the MARC and Amtrak train lines, which run almost hourly into the city. The MARC costs as little as $7 and Amtrak is about double that price. Baltimore is known for its very popular waterfront, which features restaurants, bars and a famous aquarium.

Take note, however, that the MARC train only runs on weekdays and stops service early in the evening. Weekend and weeknight travel requires taking Amtrak into the city center and then a cab or bus ride to the desired destination.

National Aquarium

Cost: $21.95 for general admission, with various packages up to $28.95 for different show combinations.

Location: 501 East Pratt St., Baltimore.

How to get there: Take the MARC Train to Baltimore’s Camden Station. The local MTA bus service stops along Pratt Street.

Atmosphere: The aquarium is the city’s most popular attraction and is world-renowned for its selection of permanent exhibits. It also includes a “4-D Immersion Theater,” which combines traditional 3-D entertainment with special effects like wind and mist.

Inner harbor

Cost: Varies.

Location: 200 East Pratt St., Baltimore.

How to get there: Same as the National Aquarium

Atmosphere: The inner harbor contains shops, restaurants and other attractions. The Maryland Science Center and the USS Constellation Museum, which is dedicated to the last all-wooden Navy warship, are both located in the inner harbor.