Sharp Park is what first occurred to me but I see it has been mentioned.
Thus I will throw into the discussion a couple of Thomas courses that have been wrecked over time. The first is Ojai, which of course has been mistreated by time, war, and even those who were supposedly restoring it. There are still some awesome golf holes there but to think of what it must have been like a hundred years ago is rather heartbreaking.
The other would be his original routing at Griffith Park, back when the river was wild and before the interstate was built. The holes on the Wilson course that are west of Crystal Springs Dr are still pretty good (these are the ones that more or less maintain the original Thomas routing, the others were re-routed thanks to the highway and other land grabs from the park).