From I-395 (Virginia):
Take 1-395 North toward Washington, D.C., cross the 14th Street bridge. Exit at Maine Avenue and keep to the right, which puts you on 9th Street, SW. At the traffic light, go straight through the intersection to Water Street, SW. Turn left and proceed past 7th Street to the Gangplank Marina on the right.

From Route 66 (Northern Virginia):
Follow Rt. 66 across the Theodore Roosevelt Bridge. Follow the main roadway and you will be on Constitution Ave., NW. Follow Constitution Avenue to 9th Street, NW. Turn right on 9th Street and follow it south through the 9th Street Tunnel. Follow signs to Maine Avenue. At the
traffic light, go straight through the intersection to Water Street, SW. Turn left and proceed past 7th Street to the Gangplank Marina on the right.

From I-50 or New York Avenue (Annapolis, Eastern Maryland):
Follow New York Avenue into Washington, D.C. Follow signs toward Massachusetts Avenue. Before reaching Massachusetts Ave., turn left onto 7th Street, NW and take 7th Street south across the Mall. 7th Street ends at Water Street, SW. Turn left on Water Street and proceed to the Gangplank Marina on the right.

From the Northwestern Half of I-495 (Northern Virginia, Montgomery County, MD):
Take I-495 toward the Maryland/Virginia border. On the Virginia side, take the exit for the George Washington Memorial Parkway. Follow the Parkway south until you see signs for I-395 North (this is the 14th Street Bridge). Cross the river on the 14th Street Bridge, and take the Maine Avenue exit to the right which puts you on 9th Street, SW. At the traffic light, go straight through the intersection to Water Street, SW. Turn left and proceed past 7th Street to the Gangplank Marina on the right.

http://www.cantinamarina.com/

All streets named below are in Northwest Washington, DC.

From Downtown Washington:  Head north on 16th Street. Cross Florida Avenue and make the next left-hand turn on Belmont Street. Belmont is a horseshoe-shaped street that turns into Crescent Place. Meridian House and White-Meyer House are both on the right, following the turn.

From Maryland and Northern Points:  Head south on 16th Street. Cross Columbia Road and continue for a half mile. Make a right turn on Belmont Street. This horseshoe-shaped street turns into Crescent Place. Meridian House and White-Meyer House are both on the right, following the turn.

From Alexandria, Virginia:  Take I-395 North across 14th Street bridge. Take the Route 1 exit towards downtown and continue north on 14th Street for about 2.2 miles. Turn left on U Street and right on 16th Street. Continue north for another two blocks and turn left on Belmont Street, one block past Florida Avenue. Belmont is a horseshoe-shaped street that turns into Crescent Place. Meridian House and White-Meyer House are both on the right, following the turn.

From Arlington, Virginia:  Take I-66 (or other access roads) across Roosevelt Bridge onto Constitution Avenue. Turn left on 18th Street, then right on New Hampshire Avenue. New Hampshire becomes one way at T Street. Turn right on T Street and immediately after, turn left on 16th Street. Continue north and turn left on Belmont Street. Belmont is a horseshoe-shaped street that turns into Crescent Place. Meridian House and White-Meyer House are both on the right, following the turn.