Crystal City

Crystal City is an urban neighborhood in the southeastern corner of Arlington County, Virginia, south of downtown Washington, D.C. Due to its extensive integration of office buildings and residential high-rise buildings using underground corridors, travel between stores, offices, and residences is possible without going above ground; thus, a large part of Crystal City is an underground city.

Crystal City includes offices of numerous defense contractors, the United States Department of Labor, the United States Marshals Service and many satellite offices for The Pentagon. It is also the location of Ronald Reagan Washington National Airport.

Crystal City is centered along a stretch of Jefferson Davis Highway (U.S. 1), just south of The Pentagon, just east of Pentagon City, and within walking distance to the west of Ronald Reagan Washington National Airport. Characterized as one of many "urban villages" by Arlington County, Crystal City is almost exclusively populated by high-rise apartment buildings, corporate offices, hotels, and numerous shops and restaurants. There is also an extensive network of underground shopping areas and connecting corridors beneath Crystal City.

Crystal City has a station on the Washington Metro Blue and Yellow Lines, and another on the Virginia Railway Express commuter train system.

The layout of Crystal City was considered avant-garde at the time of construction, with super-blocks bounded by arterial and circulating roads, and with pedestrian traffic and the businesses serving it relocated from the streets to the pedestrian tunnels. However, Crystal City has since been redesigned to give it a more traditional, urban feel, with restaurants at street level, and with traffic patterns changed to make streets like Crystal Drive function as city streets, rather than as circulating roads.

As a consequence of Crystal City's extensive integration with both office buildings and residential high-rise buildings, it is possible for most residents living to the east of Route 1 to traverse from one end to the other (roughly north-south), performing shopping or dining along the way, entirely underground, thus making a large part of Crystal City an underground city. This is of particular convenience during inclement weather.

*Source Wikipedia*