Direct answer
Cayenne, the capital of French Guiana, is an overseas region of France in South America — expect French administration, Creole culture, tropical climate, and Amazonian nature. Plan for tropical weather, basic French-language usage, and entry rules aligned with France/Schengen policies for many nationalities.
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Quick checklist before you go
Safe travels—enjoy Cayenne’s rich Creole culture, tropical flavors, and gateway to the Amazon.