In an article in the Salt Lake Tribune, we read about what happens to empty church buildings no longer being used by congregations. Some buildings are repurposed, some are razed, and some have various parts salvaged.
An article in The Atlantic describes some of the ways that Catholicism has adapted over the last couple centuries. While it had "dogmatically opposed modernity" at times, it has also found an active public profile.
Finally, an article at NPR discusses some ways that churches are experimenting with alternative ways to engage with people. Think gardening!