(DC) (Smithsonian Associates) Enjoy a fall morning walk on a natural oasis in the Potomac River with Melanie Choukas-Bradley, the author of Finding Solace at Theodore Roosevelt Island. The nearly 2-mile path follows Theodore Roosevelt Island’s shore and moves deep into the swamp and tidal inlet along the boardwalk where willows, bald cypresses, and cattails frame views of Washington, D.C. ...