Old industrial buildings were build to last, and I personally see a huge value in giving them a new life, and telling their stories from the past.
Highline by Diller Scofidio + Renfro
It used to be an old abandoned elevated railroad now transformed into a public park. What I like the most about the project is the social aspect of it, giving a public park to the society, not tearing it down and building another private office building. It's also the only park in NY with a view.