Wonderful way to get to see most of the key memorials and buildings in Washington DC. We boarded the bus at 10am and finished up at 4pm. Our guide, Evan, was great. Enthusiastic, knowledgeable and balanced ( no political agenda) , which is nice in this day and age. The driver, Sylvia, did a great job of getting us close to the sites despite the crowds of Memorial Day weekend. My wife and I were wondering if 15 to 20 minutes would be enough at each site, but it was just the right amount of time. The bus was modern, comfortable and air conditioned on a very hot day. There is quite a bit of walking required, but not strenuous. We were given about 50 minutes to eat lunch at the George Town harbour prior to going on the river cruise.