"Castillo San Felipe del Morro is one of the most recognizable landmarks in Puerto Rico—the iconic lookout is even on the island's license plate. The fortification dates back to the 16th century, during Spanish rule. There are no guides, but you can hire someone to show you around Old San Juan, including a stop at El Morro. Anyone bored by history or who can't be out in the sun too long should skip it, but the scale and longevity inspire awe among most visitors." - Alicia Kennedy
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