View of the Rio Grande in Big Bend National Park, Texas

Small loch in Glen Etive, Scotland

Nossa Senhora da Graça Fort near Elvas, Portugal

Annular eclipse over New Mexico, May 20, 2012

Thousands of jack fish swimming together at Cabo Pulmo National Park, Sea of Cortez, Baja California, Mexico

An indigo bunting on a sunflower

Mulberry harbour at Arromanches-les-Bains, Normandy, France

Black-mandibled toucan in the rainforest canopy of La Selva Biological Station in Costa Rica

Eastern Island and Spit Island, Midway Atoll

Cyclists on a wooden suspension bridge over the Soča River in Slovenia

Springboks near a waterhole in Etosha National Park, Namibia

Aerial view of the Grotta della Poesia (Poetry's Cave) near Roca, Lecce, Italy

Military Women's Memorial, located at the gateway to Arlington National Cemetery, Virginia

California sea lion in a forest of giant kelp near the Channel Islands of California

Alley and bamboo grove in Wuhou Temple, Chengdu, Sichuan province, China

Robin's nest with a brown-headed cowbird egg

'I Can Hear It,' an installation by artist Ivars Drulle on the beach by the villages of Middelkerke and Westende, Belgium

The total lunar eclipse of April 4, 2015, photographed over Monument Valley, Utah

Sperm whale off the coast of Roseau, Dominica, in the Caribbean Sea

The Infinite Bridge in Aarhus, Denmark