Exactly why I've shot photos of stations, interlocking towers, carshops, roundhouses, etc. that are now gone. If I had a camera back in 1973, I coulda shot the cement coaling tower on the Frisco mainline in Afton, OK before Frisco had it taken down (annulled all schedules and blew it over with explosives).
This may sound odd, but I also have bricks once used for the Afton depot platform, as well as some from the wall. I also have a brick or two from the Greenville, TX Katy depot platform.