Green sea turtle diving, Great Barrier Reef, Queensland, Australia (© imageBROKER/Alamy)

Aerial view of volcanic Lake Pinatubo and mountains, Luzon, Philippines (© Amazing Aerial Agency/Offset by Shutterstock)

The George Washington Bridge displays the American flag in honor of Flag Day, June 14, 2016, Fort Lee, New Jersey (© Robert D. Barnes/Getty Images)

Eurasian brown bear cub in the taiga forest, Finland (© Jules Cox/Minden Pictures)

View of the Rio Grande in Big Bend National Park, Texas (© Ian Shive/Tandem Stills + Motion)

Small loch in Glen Etive, Scotland (© Oliver Hellowell/Minden Pictures)

Nossa Senhora da Graça Fort near Elvas, Portugal (© Luis Pina Photography/Shutterstock)