UMBC's campus is located on 500 acres. It is 15 minutes from Baltimore's Inner Harbor and 45 minutes from Washington, D.C. Baltimore Washington International Airport is five minutes away, as are AMTRAK and light rail stations. UMBC, three miles outside the Baltimore city limits, successfully lobbied the government to use 'Baltimore' as its address. While its suburban campus has minimal interaction with its surroundings, students variously consider it to be located in the towns of Catonsville (by CDP) or Arbutus (whose street grid it borders). The campus is undercut by a series of tunnels.