[monomers]

There's at least a couple on the map, e.g. https://en.wikipedia.org/wiki/Chapultepec_Castle

That one you linked definitely merits inclsion, tho. Had never heard of it. Thanks.

Edit: Or maybe not: apparently it's not considered a castle, despite the name.

[1970-01-01]

Castle means fortified stone building then? What are you considering? Wikipedia has many more. https://en.wikipedia.org/wiki/List_of_castles_in_the_United_...