Every fall, I find myself wanting to take a city trip.This time, I chose Washington, D.C. For me, Washington, D.C. has a particularly comfortable atmosphere in the fall.The weather is not as hot and humid as it is during summer, and the leaves along the streets gradually turn golden and red. As I walk through the city, I always feel like I can slow down and really take in everything around me. But this time, I did not want to spend the entire trip simply looking at the autumn scenery.Besides exploring the city on foot, I wanted to add an activity that would be a little more exciting and, even…