Safety concerns for traffic on the Arlington Memorial Bridge within the George Washington Memorial Parkway led to closure Friday of two curbside lanes and four feet of adjoining sidewalks. National Park Service officials said the closures would remain in place until emergency repairs could be completed.
In order to better track sea-level rise along the East Coast and the related impacts, National Park Service researchers have been building a database of habitat, vegetation, and erosional processes in the agency's National Capital Region.
People seem to like numbers, and hierarchy, so here's a rundown of the leading units of the National Park System in terms of 2011 visitation. The first list combs through all 397 units in the system, while the second looks only at "national parks."