Where in the world?
The flag of Denmark has a red field with a white Scandinavian cross that extends to the edges of the flag.

Denmark

Danmark

Population: 5,831,404

Region: Europe

Subregion: Northern Europe

Capital: Copenhagen

Top Level Domain: .dk

Currencies: Danish krone

Border countries

The flag of Germany has three horizontal stripes of black, red, and gold.

Germany

Population: 83,240,525

Region: Europe

Capital: Berlin