I am visiting my son in New York from London for 12days. I am going on a 5 day tour to Boston/Washington/Niagara Falls. There is also a 4 day bus tour to Tennesse for $220 - it looks good...Ruby Falls, Lost Sea, Stampede show. But I hear from some people that there is nothing in Tennesse and it's not worth it. So is Tennesse a fun place to visit for someone visiting the east coast of USA? Thanks v much!