Washington, D.C.: what to see and where to eat
Everything below comes from open data and each row says where it came from. We have not been to any of these places and we do not rank them.
Things to see

White House
official residence and office of the President of the United States
Getting there Farragut West, about 7 min on foot

Highsmith, Carol M., 1946-, photographer / Public domain
Smithsonian Institution
group of museums and research centers administered by the United States government
Getting there Smithsonian, about 4 min on foot

Washington Monument
obelisk on the National Mall in Washington, D.C.
Getting there Smithsonian, about 9 min on foot

Arlington National Cemetery
national cemetery in Virginia, United States
Getting there Arlington Cemetery, about 14 min on foot

Lincoln Memorial
memorial in Washington, D.C., United States
Getting there Arlington Cemetery, about 19 min on foot

Carol M. Highsmith / Public domain
National Mall
park in Washington, D.C.
Getting there L'Enfant Plaza - Entrance A (7th St & Maryland Av), about 6 min on foot

National Museum of Natural History
natural history museum in Washington, D.C.
Getting there Federal Triangle, about 5 min on foot
Washington National Cathedral
Neo-Gothic cathedral located in Washington, D.C.
Getting there Cleveland Park Metro Station - West Entrance, about 18 min on foot

Jefferson Memorial
memorial in Washington, D.C., United States
Getting there Smithsonian, about 17 min on foot

United States Holocaust Memorial Museum
United States' official memorial to the Holocaust in Washington, D.C.
Getting there Smithsonian, about 6 min on foot

National Air and Space Museum
aerospace museum in Washington, D.C.
Getting there L'Enfant Plaza - Entrance A (7th St & Maryland Av), about 4 min on foot
Places to eat
68 Cafe
Food: vietnamese, asian
Afghania
Food: afghan
Agora
Food: turkish, mediterranean
Akira Ramen & Izakaya
Food: japanese
Al Tiramisu
Food: italian
Alero Restaurant and Lounge
Food: mexican
Alfreda
Food: pizza
Alta Strada
Food: italian
Ammathar Thai Cuisine
Food: thai
Anju
Food: korean
Appioo African Bar & Grill
Food: ghanaian
Aroi Thai
Food: thai
Avenue Grill
Food: american
Axum Restaurant
Food: ethiopian
Baked and Wired
Food: coffee shop
Bar Japonais
Food: japanese, french
Barbouzard
Food: french
Blackfinn
Food: burger
Opening hours and tickets: OpenStreetMap contributors. Each one shows the day a volunteer last wrote it down, so check the official site before you set out.