Three miles from the fort's main gate are the Fort Huachuca museums. The late-19th-century bachelor officers' quarters and the annex across the street provide a record of military life on the frontier. More often than not, you'll be sharing space with new cadets learning about the history of this far-flung outpost. Motion sensors activate odd little sound bites in the multimedia experience. Another half block south, the U.S. Army Intelligence Museum focuses on American intelligence operations from the Apache Scouts through Desert Storm. Code machines, codebooks, decoding devices, and other intelligence-gathering equipment are on display. Enter the main gate of Fort Huachuca on AZ 90, west of Sierra Vista. You need a driver's license or other photo identification to get on base. International visitors need to call at least 3 weeks in advance to arrange for a military escort.