The facade of the Palau de la Musica Catalana (Palace of Catalan Music) concert hall, old city, Barcelona, Catalonia, Spain, Europe

Symmetrical view of a grand fountain with water jets in front of a classical building under a clear blue sky, Paris, France, Europe

Adult Antarctic tern (Sterna vittata) in flight near Tristan da Cunha, South Atlantic Ocean

Two hands holding monument in Schengen European Center, Schengen, Luxembourg, Europe

View over the town of Keren, Eritrea, Africa

Basilica Cistern with an orange illumination. Istanbul, Turkey, Europe

Schlossbrucke and Berliner Schloss Palace, Berlin, Germany, Europe

Vltava River by State Castle and Chateau Cesky Krumlov in town, UNESCO World Heritage Site, Cesky Krumlov, South Bohemian Region, Czech Republic (Czechia), Europe