
Castillo San Felipe del Morro, commonly called El Morro, anchors the northwestern tip of Old San Juan at the entrance to San Juan Bay. Spain began building the fortress in the 16th century and expanded it over generations to defend the strategic harbor, creating a massive, layered complex of ramparts, batteries, tunnels, barracks, and distinctive garitas, or sentry boxes. Now part of San Juan National Historic Site and the UNESCO-listed fortifications of San Juan, it reflects Puerto Rico’s long military and colonial history. The broad green esplanade emphasizes the fort’s scale, while weathered stone walls frame views of the Atlantic, the bay, and the neighboring Castillo San Cristóbal. Sea spray, deep embrasures, geometric masonry, and the contrast between ochre walls, blue water, and open grass define its most recognizable images.
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