Another place we visited while my mom and niece were here was Washington, DC. We’ve been to DC several times because we live fairly close (4-5 hours away), but my niece had never been and the last time my mother visited was when she was a small girl.
This was the first time we ever visited in the summer. We've always gone in the fall or spring. And we won’t ever go again in the summer because it was much more crowded (I guess I should have expected that, eh?).
If you ever have the opportunity to visit DC, you should. There’s lots to see. But here’s some advice for you:
1) Do not go in the summer, it’s too hot and too crowded!
2) Be aware that the traffic is awful and the parking is even worse. We were there on a weekend and there were still traffic jams and it took us almost an hour to find a parking space.
3) Wear comfortable clothes and shoes and be prepared to walk and walk and walk.
We were all exhausted by the time we left.