Locations of historical significance around Cincinnati, OH.
Mammoth Cave is a great place to visit - especially in the hot summer. You walk down into the caves and its' cool. Its amazing how nature formed these wonderful structures-- You can spend more than day if you want to view all the caves.
I just found out that Mammoth Cave was used as the model for dungeon/cave exploration in many classic role playing games. It all started with "Colossal Cave Adventure" a text-adventure game. And later evolved into some D&D campaigns and MMORPGs. Read more at http://www.boingboing.net/2007/08/13/maze_of_twisty_littl.html
I didnt really get a good idea from the point descriptions - just some names of the places - can you add some info to make this easier to check out next time - Peace