From my portfolio,
Quarry at Giants Ridge - former sand mine on one side of road, former taconite mine on the other
Legend at Giants Ridge - former USA Olympic Biathalon Training Site
Brookstone near Marietta, GA (and Legacy in same town) - Former Civil War Skirmish site
Links of Sierra Blanca, Ruidoso, NM - Former airport (where nearby mountains caused one too many accidents)
Cowboys Golf Club, Grapevine, Tx - Former excavation site for nearby Lake Grapevine Dam (and in building that, they found some dinosaur skeletons)
Whitestone in Benbrook, TX had the first white settlement house west of Ft. Worth with some artifacts to prove it
Cross Timbers in Azle, Tx has a former undeground safe house for Indian attacks from the 1800's
Palm Spring Golf Resort in Indonesia had some WWII Japanese Quonset huts and the like as a former camp.
I dd a nine hole expansion on an Air Force base in Clovis, NM where the site had been used for toxic waste burials.