The Opera Ball at the Vienna State Opera, Austria (© APA-PictureDesk GmbH/REX/Shutterstock)(Bing United States)

[20170223] - 'The Opera Ball at the Vienna State Opera, Austria (© APA-PictureDesk GmbH/REX/Shutterstock)(Bing United States)'

The fortifications of Kotor, Montenegro (© Slavica Stajić/500px)(Bing United States)

[20170222] - 'The fortifications of Kotor, Montenegro (© Slavica Stajić/500px)(Bing United States)'

Ice in a crater of the Vastitas Borealis region of Mars (© ESA/DLR/FU Berlin (G. Neukum))(Bing United States)

[20170221] - 'Ice in a crater of the Vastitas Borealis region of Mars (© ESA/DLR/FU Berlin (G. Neukum))(Bing United States)'

Mount Rushmore in South Dakota (© guillaumelynn/Shutterstock)(Bing United States)

[20170220] - 'Mount Rushmore in South Dakota (© guillaumelynn/Shutterstock)(Bing United States)'

Torronsuo National Park in Finland (© Teemu Tretjakov/500px)(Bing United States)

[20170219] - 'Torronsuo National Park in Finland (© Teemu Tretjakov/500px)(Bing United States)'

Vieste on the Adriatic coast of Italy (© Peter Adams Photography Ltd/Alamy)(Bing United States)

[20170218] - 'Vieste on the Adriatic coast of Italy (© Peter Adams Photography Ltd/Alamy)(Bing United States)'

Waterfalls in a canyon of Siberia’s Putorana Plateau, Russia (© Sergey Gorshkov/Minden Pictures)(Bing United States)

[20170217] - 'Waterfalls in a canyon of Siberia’s Putorana Plateau, Russia (© Sergey Gorshkov/Minden Pictures)(Bing United States)'

James Turrell’s ‘Twilight Epiphany’ Skyspace at Rice University, Houston, Texas (© Alex Fradkin/Gallery Stock)(Bing United States)

[20170216] - 'James Turrell’s ‘Twilight Epiphany’ Skyspace at Rice University, Houston, Texas (© Alex Fradkin/Gallery Stock)(Bing United States)'

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