Panoramic view of the Bernina Range with blood moon, Eastern Alps, Engadin, Switzerland

Windmills, Kinderdijk, Netherlands

Masai giraffe in Maasai Mara, Kenya

Nurses serving with the American Red Cross in Paris, France, in May 1919

The village of Oia on the island of Santorini, Greece

Panther Creek Falls in spring, Gifford Pinchot National Forest, Washington

View of Göreme from an observation deck, Göreme National Park, Cappadocia, Turkey

Koala mother and 8-month-old joey, Queensland, Australia

Swedish telescope at La Silla ESO Observatory, Chile

A path winding through a forest carpeted with bluebells in Hertfordshire, England

Tree in blue agave field in the tequila-producing region near Atotonilco el Alto, Jalisco, Mexico

Wadi Rum, Jordan