There are a number of buildings that remain on the Riddle Farm. The developer has said he will preserve them, but I am not so sure you can trust what he says. Indoor track and I believe something referred to as the starter's barn.
My father was Sam Riddle's doctor in the latter part of his life. He always said that his house was really something to see. Even a hedge maze behind it that I wandered as a boy. Unfortunately the house burned down many years ago.
