I have posted some photos from my walk last year on the Capital Crescent Trail in Washington DC.
The Capital Crescent Trail goes along the Potomac River in Washington DC (on the C&O towpath). I hiked first along the Arlington, Virginia side of the Potomac (starting at the north end of the Teddy Roosevelt Island Parking lot) then crossing over at Chain Bridge and heading back down the Capital Crescent trail and over the Key Bridge to and making a loop hike out of it.
More photos: Shaker Village of Pleasant Hill, Kentucky – Paris, France – Glacier National Park – The Cloisters Museum and the Museum of Modern Art – Great Falls National Park