Revelers prepare for the Festa da Bugiada, a traditional folk event held annually to celebrate St. John, in Sobrado, Valongo, Portugal on June 24. The Festa da Bugiada is an ancient tradition which unfolds in the form of a struggle between Moors and Christians, known locally as Mourisqueiros and Bugios.

Revelers perform down the street in the Festa da Bugiada in Portugal on June 24.

A festive mask is worn by a reveler in the Festa da Bugiada in Portugal on June 24.

"Children of mud", devotees with their bodies covered in mud and wearing banana leaves, attend a mass during a religious festival in Aliaga, north of Luzon, the Philippines, on June 24. Hundreds of devotees marking the feast of St. John the Baptist attended the annual religious festival.

A Catholic man rubs mud on his son's body prior to attending a holy mass to mark the 'Taong Putik' (Mud People) Festival and the feast of St. John the Baptist in Bibiclat, the Philippines on June 24. Devotees cover themselves in mud and leaves as part of a more than 100-years-old ritual to honor their patron saint and to ask for favors through prayer.

A girl prays inside the house of San Juan, the patron saint of Ocumare de la Costa, on the eve of San Juan Day in the central state of Aragua June 23, 2011. This year's start of San Juan Day celebrations coincides with celebrations for the Catholic festival of Corpus Christi, when people dressed as colourful devils dance on coastal towns before praying in front of churches.

A woman wearing an fish mask dances during the celebrations of the Catholic Corpus Christi in Naiguata, Venezuela, Thursday, June 23, 2011. Spanish conquerors and Catholic priests presented dancing devils ceremonies to Latin America's African slave population 200 years ago, who adopted them incorporating drums.

A person dressed as a dancing devil walks on his knees to give thanks for a miracle during a traditional dance celebration in Naiguata, Venezuela, Wednesday June 22, 2011.