Born-Digital or AnalogAnalogTranscriptRock formations Rock formations on Smoky Hill trail called Castle Rock. Post Empire Ag 11 1965 po241 25 The haunted fort on Interstate #25 near Wyoming- Colorado border. Post Empire Ja 30, 1966 P-37 Natural Fort formation lie3 on International. 25 seven miles south of COLORADO WYOMING border. Post Empire My 21, 1967 P-36 Pillars of Hercules rock formation located in South Cheyenne Canyon, see. Picture file: Colorado. Canyons and Rivers. Cheyenne Canyon, SouthCollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
