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

The renovated Rose Main Reading Room, New York Public Library Main Branch, New York City

The medieval walled town in Tossa de Mar, Catalonia, Spain

Whooping cranes taking off during spring migration in South Dakota

A bee dives into a lotus flower at Kenilworth Park and Aquatic Gardens in Washington, DC

Fallen rhododendron petals line a trail through Pisgah National Forest, North Carolina

Centre Pompidou Málaga in Málaga, Spain

Ålesund, Norway