A building at the base of the Horseshoe Falls in Niagara Falls, Canada. | (REUTERS/Aaron Lynett)

A demonstrator gives a flower to a riot police officer during a protest against Bolivia's new health-care policies in La Paz. | (REUTERS/David Mercado)

A flock of starlings fly over the Jordan Valley in Israel. | (ATEF SAFADI/EPA-EFE/REX/Shutterstock)

A couple hugs as they celebrate the new year in Rio de Janeiro. | (AP Photo/Leo Correa)

School children attend a yoga class in Ahmedabad, India. | (REUTERS/Amit Dave)

A girl stands near the demilitarized zone between the two Koreas. | (REUTERS/Kim Hong-Ji)

A child caresses the face of Pope Francis. | (AP Photo/Gregorio Borgia)

A herd of buffalo drive across Hungary's Kiskunsag National Park. | (Sandor Ujvari/EPA-EFE/REX/Shutterstock)

Workers at a fish farm in Russia. | (REUTERS/Ilya Naymushin)

A super moon rises behind the MesseTurm tower in Frankfurt. | (REUTERS/Kai Pfaffenbach)

Rohingya children inside a classroom at a Bangladeshi refugee camp. | (REUTERS/Tyrone Siu)

A squirrel sits on a fence in New York's Battery Park. | (ALBA VIGARAY/EPA-EFE/REX/Shutterstock)

**See last year's best photojournalism**