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Liberty Bell
Independence Hall
Potomac River
around 18,000 cherry trees
Alamo
Gateway Arch
Federal Reserve
USA's second busiest high speed rail system
George Washington University
Mount Rushmore
Georgetown University
Watergate complex
Supreme Court
Washington Monument
Vietnam Veterans Memorial
American University
Dome of the Rock
White House
Statue of Liberty
Chesapeake & Ohio Canal National Park
17 Smithsonian museums, galleries, and a zoo
Mount Vernon
170+ foreign embassies
Capitol Hill