SAS sandals for me. I have worn them for years and still find them to be the most comfortable shoes.

Easy Spirit Travel time. Warning-pricy and habit forming. I now have them in many colors.

Another vote for Keens....they are so comfortable...

Wear something with a thick sole. The pavement is very hot. Yes you will do a lot of walking in Washington DC. It is worth the trip to see everything there. There is something new to see everytime I'm there.

I just recently purchased shoes called ortho heel they come in many diffrent styles after you wear them a day or two you will not want to wear anything else my feet and legs no longer hurt me a bit pricy but well worth it

I'm a Birkenstock girl. I get mine from either HSN or QVC.

I have been wearing Birks for over 25 years and they are the best for me. I use the three stap style because it fits me better and I always try to buy a new pair when they are on sale. Alternately I will wear a good pair of athletic shoes like Reeboks or Rockports. A lot depends on where and what the climate is like.

Heflinger are the ones for me.

I'm surprised no one has mentioned RIKA shoes. I got a pair off QVC recently, and love them. I have very temperamental feet, and yet I didn't have to break them in at all. Until I got them, I wore only SAS and Clarks 100% of the time. RIKA's are supposed to have been made for a woman's foot, not just adjusting a man's shoe into a women's shoe.

I highly recommend the Clarks wave technology soles. I am on my feet walking on hard concrete all day. They feel like somebody is giving you a little push along.