[Huck]

My understanding is that Fort Jefferson during and after the war was a prison. I'd like to see that plaque you describe.

[stainlessbanner]

Lat: N 24 37' 38.2"
Long: W 82 52' 19.5"

Look for a big fort.

[BigNate]

It was used as a prison. They didn't completely finish construction until after the war. Like all Government projects, they just kept building, even if they didn't need it. I don't claim to be an expert on the subject (or any other) I just know what I read. Go there. It is worth the trip, even if you just go for birding.