Rainbow over Wasson Peak, Saguaro National Park, Arizona

© Frank Staub/Getty Images

Sandstone formations in the badlands near Caineville, Utah

© Chris Moore/TANDEM Stills + Motion

Tree frog, Costa Rica

© Ondrej Prosicky/Shutterstock

Ostuni at dusk, Apulia, Italy

© Feng Wei Photography/Getty Images

Aerial view of Sydney Harbour, New South Wales, Australia

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Superbloom in Carrizo Plain National Monument, California

© Robb Hirsch/TANDEM Stills + Motion

Female black-naped monarch nesting

© komkrit tonusin/Alamy

Odeon of Herodes Atticus, Acropolis of Athens, Greece

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