It is required to book a tour 14 to 90 days prior your visit.
Tours are free of charge.
Wikipedia https://ko.wikipedia.org/wiki/펜타곤
Official Website https://pentagontours.osd.mil/
이메일 osd.pentagon.pa.mbx.pentagon-tours-schedule@mail.mil
전화 (703) 697-1776
주소 Washington, DC, USA
좌표 38°52'15.568" N -77°3'21.328" E