Where in the world?
The flag of Guyana has a green field with a red isosceles triangle on the hoist side, bordered by narrow white and gold stripes.

Guyana

Population: 786,559

Region: Americas

Subregion: South America

Capital: Georgetown

Top Level Domain: .gy

Currencies: Guyanese dollar

Border countries

The flag of Brazil has a green field with a yellow diamond and a blue globe with stars in the center.

Brazil

Population: 212,559,409

Region: Americas

Capital: Brasília
The flag of Suriname has five horizontal stripes of green, white, red, white, and green with a yellow five-pointed star in the center.

Suriname

Population: 586,634

Region: Americas

Capital: Paramaribo
The flag of Venezuela has three horizontal stripes of yellow, blue, and red with eight white stars in a semicircle in the center of the blue stripe.

Venezuela (Bolivarian Republic of)

Population: 28,435,943

Region: Americas

Capital: Caracas