Over the years fire events and other forces work on the sequoias to change them, and it's interesting to see the changes over time. Below are some comparison pictures that show how some of the trees have changed, and some are still the same in spite of things. Credit to NPS for most of the old pics.
The Auto Log in Giant Forest fell in 1917 and has starred in pictures ever since.
Grace Alles and her cabin in Atwell Mill
The Arm Tree in Atwell Mill
Hercules in Mountain Home
The Keyhole Tree in Giant Forest
Rejuvenated Tree at the Big Stump entrance station
Sentinel in Giant Forest
Ned By Ed, or By Ned Uncle Ed
Susan B. Anthony Tree near Round Meadow in Giant Forest
Tunnel Log in Giant Forest
Entrance Trees in Atwell Mill
The Four Guardsmen on the General's Highway near the south entrance to the Giant Forest