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Callao - Wikipedia
Callao: 5 tourist places that will leave you with your mouth open
Callao | Seaport & Historical Significance | Britannica
Callao – Travel guide at Wikivoyage
THE 15 BEST Things to Do in Callao - Tripadvisor
Callao: Lima's Port To The World - Peru Hop
Callao: 5 tourist places that will surprise you - Tierras Vivas
Callao, a beautiful tourist destination very close to Lima
Callao District - Wikipedia
TOURISM | monumentalcallao