Tom W.-
It appears that the domed resort at West Baden was loosely inspired by the domed spas at Baden Baden, including Friedrichsbad, which was built in 1877.
My dad played the Ross course last fall and also said that from the back tees, it was a monster.
-AJ
"West Baden Springs Hotel - originally built in 1902 and modeled after the greatest spas in Europe, complete with the world's largest free-span dome. Once dubbed the "Eighth Wonder of the World", the hotel was a haven for celebrities, gamblers and political figures."
--from frenchlink.com