Horsing around, inciting riots and making a new year splash! ... Around the world in 10 photos

The streets of Spain were filled with smoke and glowing embers as the mountain village of San Bartolome de Pinares, west of Madrid, celebrated the Las Luminarias festival.
Horses emerged from the darkness into the flames at full gallop in the purification ceremony.
What other countries have celebrated age-old traditions?
From under-water dances to a Lunar New Year … It’s the most influential photos of the week.