What did they do with it once it hit the ground? It would take a pretty good team of mules to move those logs.

Pictures don't even come close to the awe you will feel seeing them in person. I've been in the redwood groves three or four times over the years. The first time in the 60's as a kid on family vacation.

Wonder if any of those fellers came down with " cedar lung ' caused by the thujaplicatin in that tree
you can see the tree healed itself at the core with that dark rot showing

So where is the best place (State park) to go see them?

There are various groves along the redwood highway in northern California close to the Oregon border. These are the coastal redwoods the world's tallest (Sequoia sempervirens). The other California monster is the giant sequoia Sequoiadendron giganteum. It is found around 5000 feet in the Sierra Nevada. The most famous specimen being "The General" which has more cubic feet of wood than any other tree recorded if I'm not mistaken.