DC
United States National Arboretum is one of DC.

1. United States National Arboretum

9.0
3501 New York Ave NE (at Hickey Ln NE), Washington, D.C.
Botanical Garden · National Arboretum · 60 tips and reviews

DC Preservation LeagueDC Preservation League: The national arboretum of the United States, is a major element of the city's park system. It is the noted work of landscape Federick Law Olmstead, Jr.

National Japanese American Memorial to Patriotism in WWII is one of DC.

2. National Japanese American Memorial to Patriotism in WWII

8.2
27-49 Louisiana Ave NW (btw D St & New Jersey Ave NW), Washington, D.C.
Monument · Downtown-Penn Quarter-Chinatown · 4 tips and reviews
Washington Navy Yard is one of DC.

3. Washington Navy Yard

736 Sicard St. SE, Washington, D.C.
Military Base · Navy Yard · 16 tips and reviews
National Air and Space Museum is one of DC.

4. National Air and Space Museum

9.2
6th St. (Independence Ave SW), Washington, D.C.
Science Museum · Southwest Washington · 638 tips and reviews
United States Holocaust Memorial Museum is one of DC.

5. United States Holocaust Memorial Museum

8.8
100 Raoul Wallenberg Pl SW, Washington, D.C.
History Museum · Southwest Washington · 256 tips and reviews
The Pentagon is one of DC.

6. The Pentagon

1400 Defense, Arlington, VA
Government Building · The Pentagon · 98 tips and reviews
Newseum is one of DC.

7. Newseum

555 Pennsylvania Ave NW (at 6th St NW), Washington, D.C.
Museum · Downtown-Penn Quarter-Chinatown · 306 tips and reviews