I've seen a number of forts, Mama, but none can rival the power of the huge Castillo de San Marcos.
It is stark and quite imposing, moats and all, and utterly dominates the landscape.
Walking all of it and the underground expanses requires endurance and stamina I no longer have.
Thinking of those Indians who were incarcerated there brought great sorrow.
Here is a link to an informative site about the castle; just click on the graphic:
Excerpt:
The Second Spanish Period ended in 1821 when Spain gave Florida to the United States, and in 1825 the name was again changed -- this time to Fort Marion. During the ensuing years the old structure was used, at various times, to house Indian prisoners during the Seminole Wars; to house Confederate soldiers during the Civil War; for holding Plains Indians captured during western campaigns; and as a military prison during the Spanish American War.
Read what is - HERE - and weep, reading a letter written by an Indian descibing the conditions and an escape by two of them.
More info about the Indians is - HERE -
Scroll down 3-4 pages for the names of some of the important Indians there - won't let me copy any part of the book.
Seem to recall that Chief Geronimo was imprisoned there also...