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Callao - Wikipedia
Callao | Seaport & Historical Significance | Britannica
Callao: 5 tourist places that will leave you with your mouth open
Callao – Travel guide at Wikivoyage
Callao: Lima's Port To The World - Peru Hop
THE 15 BEST Things to Do in Callao - Tripadvisor
A Guide to the City of Callao in Peru
Callao - Wikiwand
Top Things to Do in Callao - Tripadvisor
Monumental Callao: Renaissance in Callao’s historic port district