Library of Congress   9:00 and 10:00 AM Appointment

The Library of Congress is the nation's oldest federal cultural institution, and it serves as the research arm of Congress. It is also the largest library in the world, with more than 120 million items on approximately 530 miles of bookshelves. The collections include more than 18 million books, 2.5 million recordings, 12 million photographs, 4.5 million maps, and 54 million manuscripts.
The Library's mission is to make its resources available and useful to the Congress and the American people and to sustain and preserve a universal collection of knowledge and creativity for future generations. The Office of the Librarian is tasked to set policy and to direct and support programs and activities to accomplish the Library's mission.

http://www.whitehouse.gov/

For two hundred years, the White House has stood as a symbol of the Presidency, the United States government, and the American people. Its history, and the history of the nation’s capital, began when President George Washington signed an Act of Congress in December of 1790 declaring that the federal government would reside in a district "not exceeding ten miles square…on the river Potomac." President Washington, together with city planner Pierre L’Enfant, chose the site for the new residence, which is now 1600 Pennsylvania Avenue. As preparations began for the new federal city, a competition was held to find a builder of the "President’s House." Nine proposals were submitted, and Irish-born architect James Hoban won a gold medal for his practical and handsome design.

http://www.aqua.org/

The National Aquarium in Baltimore seeks to stimulate interest in, develop knowledge about, and inspire stewardship of aquatic environments.

Exhibits are designed to replicate natural environments and avoid the unnatural mixing of species. Specimens are chosen to give the best examples of biological concepts in an interesting and accurate way. The collections embrace diverse world-wide habitats.

The ultimate goal is for the exhibits and programs to spark

http://baltimore.orioles.mlb.com/NASApp/mlb/index.jsp?c_id=bal

Tenant: Baltimore Orioles (AL)
Opened: April 6, 1992
Surface: Maryland Bluegrass
Capacity: 48,262

Oriole Park at Camden Yards Trivia:
Site of the 1993 All-Star game.
Camden Yards complex includes the Baltimore & Ohio Warehouse, the longest building on the East Coast (1,016 feet long by 51 feet wide).
Warehouse contains Orioles offices as well as a cafeteria, sports bar, gift shop, and the exclusive Camden Club.
Banks of lights are mounted on the roof of warehouse.
Each aisle seat in the park features an 1890s Orioles logo.
Unique double-decked bullpens in left-center field.
Playing field is 16 feet below street level.