Looking west at the intersection of Independence Avenue SW and 12th Street SW in Washington, D.C., in the United States. The Smithsonian Metro station is to the left. The skywalk connects the U.S. Department of Agriculture's headquarters building (right) with the USDA South Building (left). Independence Avenue west of 15th Street SW has a 55-foot-wide grassy median to preserve that area's park-like appearance. No such median exists east of 15th Street SW.