Where are the Castles?

I am plowing through (slowly) Hans Holzer's large hardcover tome Ghosts and have gotten as far as page 421 of 750 so far. Its a good book, having explored such notable places as the Whaley House in San Diego, Hollywood, the New York City area and a few other places.

The author also visits his bative Austria, France, England, Scotland and Ireland in his pursuit of ghosts. On a trip to Ireland and Scotland, he visits old castles and buildings that have been standing and are still occupied, either as private residences or as hotels since the Middle Ages.

Which brings me to ask the question - "Where are the American Castles?". It would seem to me that since many of the early Pilgrims and other northern European arrivals to American shores since the Revolution came from Britain, Scotland, Ireland and Germany that someone would have brought the castle as an architectural style with them. Aside from Disney's Magic Kingdom and Las Vegas' Excalibur casino, which were designed as tourist attractions, why hasn't the concept of a 'castle' caught on here? Surely, we had the trees whose trunks could have been used as interior building materials surrounded by rock and concrete, which are building materials we use now, so why not build castles?

As far as I know, there are only two structures in the US that qualify as true castles - the Hearst Castle in California and the Vikingsholm Castle at Lake Tahoe, on the California side. If anyone knows of any other 'offically designated' American castles, please pass them on with a photo and I'll post them.

Interestingly, though, we have an an American saying here that 'a man's home is his castle', but like everything else, even that has come under attack, with the recent rulings supporting eminemt domain by people who have more money than you so therefore can take your property from you, if they have the cash to make improvements to the place. There is a movement to take Justice David Souter's barn in New Hampshire and convert it into the 'Hotel Lost Freedom'. due to his support for the reckless use of eminent domain.