
Castillo San Felipe del Morro was commissioned by Charles I in 1539 it has stood over San Juan Harbor ever since. It has seen plenty of battles with the English and Dutch. The US shelled the structure in 1898. During World War II new concrete artillery observation posts (seen above) and an underground bunker were added. Today it recieves nearly 2 million annual visitors and is a UNESCO World Heritage Site. (San Juan, Puerto Rico, 2010)
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