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Castillo (castle) de San Marcos in St Augustine, Fla

This is the oldest masonry fortification in the continental United States, dating back to 1565. It was initally built by the Spanish to protect their empire in America.

 

The castle lasted so long due to the solid stone blocks it was built of. These blocks were made of the local sand mixed with seashells, all cut and set by hand!

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Uploaded on March 6, 2011
Taken on February 22, 2011