Mammoth Cave was awesome! I highly recommend it. And frankly, after that, everything was kind of a let down. I guess I'm just not much of a city tourist. I'd rather see the wonders of nature than the wonders of man--hence why New York has never really appealed to me and I think it's just a hole to visit.
Now that I've shared my narrow minded view of a city I've only been to once, I'll get back to the subject-- or better yet, the pictures.
Main entrance to Mammoth Cave. 54 degrees and freezing when it was 95 outside.