Castillo De San Marcos

This fort is the oldest fort in the United States. It is located on the western shore of Matanzas Bay, in the city of St. Augustine, Florida. This fort is a large Spanish stone fortress built to protect and defend Spain's claims in the New World. It's a National Monument and, at over 315 years old, it's the oldest structure in St. Augustine. Inside boasts a museum of artifacts, rooms and history of the people. My kids absolutely loved learning about how it all started.