Mackinac Bridge

Mackinac Bridge
Mackinac Bridge, taken from the ferry on the way to Mackinac Island.

Thursday, May 9, 2013

Castillo de San Marcos National Monument- Florida


"Spanish Castillo de San Marcos is the oldest complete masonry fortification remaining in continental US. Construction was started in 1672. Its 16 foot-thick walls are built of coquina, a natural shellrock quarried on nearby Anastasia Island. The Castillo withstood major English attacks in 1702 and 1740, and in its later years as a prison held many men famous in US history."

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