I remember going past this a long time ago on a trip to Keeneland. I googled it and here’s the dirt:
Rex and Caroline Bogaert Martin got the idea for the castle during a vacation in Europe. The Martins initially had trouble finding suitable acreage for the new home, but finally purchased 53 acres along U.S. 60 and Pisgah Pike. Plans were drawn in 1968 and ground was broken the next year. But in 1975, while the castle was still under construction, the Martins divorced. Whether the castle’s progress had anything to do with the separation is part of its mystery. Divorce records give only an oblique reference to the castle acreage.
Read the rest here. Google Street View. Google Maps.
