LOL;
Limestone underlies Tennessee like no other place on Earth. Cave central! I should know, I have been in about 2000 of them, I think. Wonders beyond the imagination of the most gifted GCA.
There is a cave in Fentress County of such dimensions that we could build a golf course INSIDE. It is about 80ft wide and 60ft high for 3.5 miles. It has very smooth flat passage with all the breakdown firmly up against the sides [hazards!]. Of course it would have a little bit of a flooding problem, since it will flash flood to the ceiling, like a toilet flushing, when a lot of rain falls in the area in a short amount of time. Hmm, guess we could just resod after every storm.
You'de use a durable golf ball, since shots would mostly involve a sort of billiard/golf. Shall we call it trogolf?
Doug