Rockcastle does still exist but the post office is no longer in operation and there are only about 4 or 5 houses there. The post office was moved to someone's property there and they are in the process of restoring it. It is way out on a ridge outside of Ripley about 5 or 6 miles....took me 3 years to find it and am not sure I could get back there again....so beautiful out there though. Hope this helps! -Shari Searching for the Little family.