Grab your camera and take photographs of the vessels moored at Gangplank Marina. Colorful sailboats coupled with the rippling water can make for some stunning snaps.
You're spoiled for sightseeing choice when in Southwest. Gangplank Marina is a great place to start here, but there are many other worthy places to explore. White House, Arlington National Cemetery, and Lincoln Memorial are close to the yacht and boat harbor and and will cap off your day nicely.