In P3D (v3 and v4 are the versions I own), CYAW (CFB Shearwater) has a nuclear plant cooling tower at the base of what is now taxiway A but which used to be a runway; it still is in P3D. There has never been a nuclear plant there; in fact, there are no nuclear plants in the province of Nova Scotia. It is a longstanding error in the original Microsoft code.
There was a file available on AVSIM to eliminate the tower in FS9 called "removal_of_nuclear_plant_in_nova_scotia_canada.zip" but it doesn't seem to work in P3D V4.
I can supply screen caps and a Google map cap to illustrate the issue, if you wish.
Thanks.