Residence Inn By Marriott Pentagon City is located in Crystal City, a neighborhood in Arlington, and is in the suburbs and near a metro station. Fashion Center at Pentagon City and Union Station Shopping Center are worth checking out if shopping is on the agenda, while those wishing to experience the area's popular attractions can visit Smithsonian Institution and National Air and Space Museum. Looking to enjoy an event or a game? See what's going on at Capital One Arena or Nationals Park.