There are many theories as to the origin of the Carnival with stories of it being a pagan celebration in ancient Rome. Carnival balls became popular in Rio in the nineteenth century with legendary balls held at the Copacabana Palace Hotel and the Municipal Theater. The inevitable influence of Afro-Brazilian culture in the form of the samba heralded the beginning of the Samba Parade in the 1930s. It is the ethnic melting pot of Rio that makes this festival unlike any in the world. The combination of the cultural diversity and Brazilian swing rhythm is what makes the Carnival in Rio so unique. No matter where it comes from, it becomes a great party which attracts audience and enthusiasts from all over the world. Here a picture of the best carnival pics in 2012!