El Rocio

Pilgrims crowd around the Virgin of El Rocio during a procession around the shrine of El Rocio in Almonte, southern Spain, May 16, 2016. REUTERS/Marcelo del Pozo

Marcelo del Pozo/Reuters

Pilgrims crowd around the Virgin of El Rocio during a procession around the shrine of El Rocio in Almonte, southern Spain

Pilgrims from the Sanlucar de Barrameda fellowship lead their horses ashore as they make their way to the shrine of El Rocio in the Donana National Park, southern Spain May 15, 2013. Every spring, hundreds of thousands of devotees converge at a shrine to pay homage to the Virgin del Rocio during an annual pilgrimage which combines religious fervour and festive colour. REUTERS/Marcelo del Pozo  (SPAIN - Tags: SOCIETY RELIGION ANIMALS)

Marcelo del Pozo/Reuters

Pilgrims from the Sanlucar de Barrameda fellowship lead their horses ashore as they make their way to the shrine of El Rocio in the Donana National Park, southern Spain, on Wednesday. Every spring, hundreds of thousands of devotees converge at a shrine to pay homage to the Virgin del Rocio during an annual pilgrimage which combines religious fervour and festive colour.