Learn more about the naked holy men of the Kumbh Mela festival.
These sacred bells are a symbol of the Osun-Osogbo festival.
Bathe in the Ganges River with American pilgrim Karmen Plasencia.
Host Bruce Feiler arrives in the city of Osogbo, Nigeria.
Modern technology meets ancient religious rituals at the Western Wall in Jerusalem.
Technology and social media at the Hajj.
Look inside one of the world's largest underground cathedrals in Lourdes, France.