Mute swan in Valkenhorst Nature Reserve, near Valkenswaard, the Netherlands

Karst mountains in Guilin and Lijiang River National Park, China

Cypress trees in autumn, Georgia

Hoffmann's two-toed sloth mother and young, Puerto Viejo de Talamanca, Costa Rica

Thuringian Forest in autumn with Wartburg Castle, Germany

Guggenheim Museum Bilbao, Spain

Long-eared owl in the Bohemian-Moravian Highlands of the Czech Republic

Prince Christian Sound in southern Greenland

Naqsh-e Rostam archaeological site near Persepolis, Iran

Waterfall on the Río Arazas in Ordesa y Monte Perdido National Park, Pyrenees, Spain

Bull and female moose in Denali National Park, Alaska

Ammonite Pavement at Monmouth Beach, Jurassic Coast World Heritage Site, Dorset, England

Wall screw-moss glistening with water droplets, Netherlands

The 'Circle of Sacred Smoke' sculpture by Junkyu Muto frames Devils Tower in Wyoming

Phytoplankton blooming in the Chukchi Sea off the coast of Alaska

Glass octopus in the Atlantic Ocean off Cabo Verde

Designs projected on the Oberbaum Bridge during the yearly Festival of Lights in Berlin, Germany

Caribbean flamingos, Ría Lagartos Biosphere Reserve, Yucatán Peninsula, Mexico

Cosmic Cliffs in the Carina Nebula

The Port House, designed by Zaha Hadid Architects, Antwerp, Belgium