I received E-Mail that said:

There is a castle high on the hill above Union Square in Somerville, Massachusetts. I've asked some co-workers, and they told me that it was the first place in the country where an american flag was ever raised, but beyond that I could get no information.

It's basically just one big tower with several adjoining smaller towers. It's made entirely of stone, with crenelations at the top of each tower. It's rather small, but very impressive nonetheless.

Later, I received E-Mail that said:

Check this site out about Prospect Hill in Somerville Ma. You have it listed as a "Castle" but it is basically a monument. But, as a kid growing up we used to make believe it was a castle!!!!

Back to "Castles of the United States"

This castle suggested by Nick Wasserman.
Photo courtesy of David Taranto.