Diamond Caverns WEbsite: click here.
Our original plan was to go on the Mammoth Caves tour- but our trip was sort of last minute and the tour we wanted to go on was sold out.
We found Diamond Caverns on-line, and it was only a few minutes from Mammoth Caves (maybe 5-10 minutes away). They do tours every 30 minutes (9am-5pm) with no pre-registration required. So this fit our schedule perfectly!
It was 90 degrees outside the day we went, and only about 55-60 degrees in the cave. It was a great escape from the outside temps.
There are about 350 stairs throughout the tour, so keep that in mind when deciding if it’s the right tour for your kids. My 6 and 10 year old did pretty well but I’m not sure it’s right for younger kids.