Where in the world?
The flag of French Guiana divides diagonally with green in the upper fly and yellow in the lower hoist and bears a red five-pointed star in the center.

French Guiana

Native Name: Guyane
Population: 292,354
Region: Americas
Sub Region: South America
Capital: Cayenne
Top Level Domain: .gf
Currencies: euro
Languages: French
Border Countries: BRASUR