Sentry Box at Castillo de San Cristobal, a historic Spanish colonial fortress in San Juan, Puerto Rico

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Castillo de San Cristobal was the largest fortification built by the Spanish in the New World having been completed in 1783 to protect the city of San Juan against attack.

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Size: 3235px × 4248px
Location: Castillo de San Cristobal, San Juan, Puerto Rico
Photo credit: © Sean Pavone / Alamy / Afripics
License: Royalty Free
Model Released: No

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