The Ark?

Here is a cropped view of the photo posted on Tuesday. Clark Hall and the Administration Building are in the upper left with Firestone Lodge located in the middle right of the photograph. The home possessing a huge back porch and is at the bottom of the picture was, I believe, known as the Ark.

Would love to know more about this structure. If anyone has any information, would appreciate it if you would post a comment. Many thanks for your help.