Caribou running in snow, Alaska (© Michael Quinton/Minden Pictures)

Town Hall Square, Tartu, Estonia (© Westend61/Getty Images)

Chinstrap penguins, South Sandwich Islands, South Atlantic Ocean (© Jan Vermeer/Minden Pictures)

Ljubljana, Slovenia (© kasto80/Getty images)

Avenue of birch trees near Uffing am Staffelsee, Bavaria, Germany (© Reinhard Schmid/Huber/eStock Photo)

Village in Val Gardena at Christmas, Dolomites, Italy (© Ingus Kruklitis/Getty Images)

Christmas tree in Castle Square, Old Town, Warsaw, Poland (© Panther Media GmbH/Alamy)

Capitol Reef National Park, Utah (© Jeff Clay/Tandem Stills + Motion)

Bohemian waxwings perched on a branch, Canada (© Jim Cumming/Shutterstock)

Guild houses of Grand-Place, Brussels, Belgium (© Richard Taylor/Sime/eStock Photo)