Bettendorf Castle in Fox River Grove, Illinois.
The "Fox River Grove Castle" is located near the Union Pacific railroad racks and US 14 in Fox River Grove, Illinois.
Theodore Bettendorf started building the castle in 1931, and built for over 30 years.
It was built by an engineer homesick for Luxemburg.
The castle is not a National Registered Historical Site.
It is in McHenry County.
It is also called Bettendorf Castle.
The castle has always been a private residence, but sometimes it was used for weddings, etc.