Sentry Box at Castillo de San Cristóbal in San Juan, Puerto Rico.

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A sentry box at Castillo de San Cristóbal, a historic colonial Spanish fort on the island of San Juan, Puerto Rico.

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Size: 4326px × 3250px
Location: Castillo de San Cristóbal , San Juan, Puerto Rico
Photo credit: © Sean Pavone / Alamy / Afripics
License: Royalty Free
Model Released: No

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