One of my favorite places to go sit at during spring, summer, fall and sometimes during a nice winter day is the main campus of Georgetown University.
I just happened to go there before all the students arrived for the new school year. If you happen to live in the area or if you are visiting, Georgetown definitely has to be on your list of places to visit. This happens to be one of the oldest Catholic Universities in the country! You will not regret stopping by campus and walking around. Also, you can grab a cold beverage or hot drink at the Leavey Center!