You can wander around Pohick Bay Regional Park, Ruth B Swan Memorial Park or Diffenbach Court Park if you want a dose of fresh air. At Craney Island, Mattawoman Natural Environment Area and Mattawoman State Natural Environmental Area, take some time to really appreciate nature. If you're looking for something to do, plan a visit to Mason Neck State Park, Chapman Residual and Mason Neck National Wildlife Refuge while you're in the area.