Went on a nice ride Sunday. Went to the Rockhouse in Russell County. Also known as the Creelsboro Arch.
More info about Rockhouse arch and Rockhouse bottom:
http://www.kentuckyadventure.com/archives/27
Link to Wikipedia entry:
http://en.wikipedia.org/wiki/Creelsboro_Natural_Bridge
Here is a link to some photos I found on the internet:
http://outdoors.webshots.com/album/538294349iamcQv