Up a lazy river by the old mill run...

Are the amenities driving up the cost of college?  Knowledgable folks dispute this claim, albeit many universities are in a race to see which can be the best "country club with classes."
https://www.insidehighered.com/news/2015/06/15/are-lazy-rivers-and-climbing-walls-driving-cost-college

    University of Texas Lazy River

But there are some more significant causes:

1.  Significant declines in state funding for both public and private institutions.

2.  The high cost of delivering instruction, especially when tenured faculty teach only 1-3 courses per semester.

3.  The soaring compensation packages of senior administrators.

Just to name three biggies.