Finally a subject I can address with some relevance. My son lives in DC near Union Station, and used to work on the edge of the Mall. The Mall is immense, not just a few blocks long. Photographs make it seem a lot smaller than it is. The first time my son took me to the Capitol Steps (pre 9/11) at night, I could barely see Lincoln at the other end of the Mall. The Mall lengthwise is just under 2 miles long, The Washington Monument marks the rough midpoint of the Mall.My guess is its about a quarter of a mile wide. Be sure and look at a map before you go.
My wife is disabled, but since we had a driver (my son) we could do the tourist driving route. Since my son lives on the second floor of a no elevator building we stayed at the Phoenix Park Hotel just off Union Station. The experience was generally OK and less expensive than I expected. One thing to watch for is the beds, they were about 10 feet off the floor, well not quite but very high. It was a challenge to get into them.
The Metro is a wonderful subway system, but is not very disabled friendly, again we had our son as a chauffeur.
I was not aware of the anti-scooter policy in the museums. Some less well known outdoor attractions:
The Hirschorn Sculpture Garden - good assortment of often quirky pieces.
The Korean War Memorial - often neglected, but a powerful place.
The FDR Memorial - off to the side and less often visited.
My favorite outdoor attraction: Einstein Memorial - just off the Mall, on the grounds of the National Academy of Sciences. A giant bronze sculpture of the physicist, at his feet is a stylized map of the universe. People often sit in his lap and read.
Favorite indoor attraction: National Botanical Garden - quite small but with an upper walkway in the main exhibit, which may be elevator accessible. Lots of small rooms, including one for orchids, one for endangered species. Across the street is the Bartholdi Gardens a lovely little landscaped triangular plot, with lots of benches.
Restaurant food is incredibly varied - Ethiopian, German, Indian, Japanese, Soul, etc.. One example of the more eclectic ones is the Star and Shamrock serving up Jewish and Irish specialties in a pub setting.
As with any urban area take heed. Certain areas that are fine during the day can be problematic at night. If uncertain ask your hotel and trust your instincts. You will run into a fair number of homeless and panhandlers, but they never gave me any grief.
I never expected to enjoy the city as much as I did, I look forward to every visit (in addition to my son).
Harmony H-173 bought in 1960 (retired), Alvarez AC60S 2008, Eastman AC320ce 2008 "Hybrid", Guild D25M 1974, Martin Grand J35E 2009, Martin D12-20 1970, Martin OM-21 2009, Martin 00-15M Custom (full gloss, wide neck) 2011, Voyage-air VAOM-06 2010
"I'm glad there are a lot of guitar players pursuing technique as diligently as they possibly can, because it leaves this whole other area open to people like me."
Richard Thompson