In this age of nonstop sequels, remakes and reboots, sometimes it seems like there's no room left for original ideas in Hollywood. Why bother when there's more money to be made in dusting off an old favorite and giving it a new coat of paint?

That said, we'd like to think that some cinematic classics are too sacred to remake. With the recent fuss over Back to the Future Day, that had us thinking about the movies we never want to see remade or rebooted. These 11 films accomplished what they set out to do so well that there's simply no way of improving on the formula.

"Back to the Future 30th Anniversary Trilogy" is available to own now on Blu-ray & DVD.