The Hyatt is right in the middle of Reston Town Center, so there is plenty to do! From shopping to eating, you'll never be bored. Make sure to check out the website to see what Reston Town Center has to offer!
If you want to experience DC, it's only about half an hour away! With (hopefully, fingers crossed) a new station opening up within walking distance of the Hyatt this summer. Visiting the National Mall and the Smithsonian(s) is always a fun activity in the fall when the DC heat isn't suffocating. Keep in mind, though, this option is best as a day trip!