Mainz, Germany: Carnival dancers walk through the rain-soaked streets during the traditional Rose Monday street carnival parade Photograph: Kai Pfaffenbach/ReutersRio de Janeiro, Brazil: A samba school rides a float in the Sambadrome Photograph: Sergio Moraes/ReutersLas Palmas, Spain: A drag queen competition during carnival festivities on the island of Gran Canaria Photograph: Borja Suarez/ReutersGaissach, Germany: A man in a carnival dress is covered with snow after a Bavarian sledge race called 'Schnablerrennen' Photograph: Alexandra Beier/ReutersGuaranda, Ecuador: A reveller in a mask participates in the traditional carnival celebrations Photograph: Guillermo Granja/ReutersOruro, Bolivia: A reveller parades during carnival celebrations Photograph: Dado Galdieri/APParaty, Brazil: Revellers covered with mud perform during the "Bloco da Lama" street carnival parade Photograph: Joao Padua/AFP/Getty ImagesRijeka, Croatia: People dance in the northern Adriatic port Photograph: Hrvoje Polan/AFP/Getty ImagesBarranquilla, Colombia: Carnival groups march during the Batalla de Flores parade. Colombia's Carnival of Barranquilla was declared by the United Nations Educational, Scientific and Cultural Organisation (UNESCO) to be a tradition of Oral and Intangible Heritage of Humanity in 2003 Photograph: Ricardo Maldonado/EPAMohacs, Hungary: People wearing wooden masks step out of boats after crossing the river Danube during the traditional Buso carnival Photograph: Karoly Arvai/ReutersPort-of-Spain, Trinidad: Children dance to soca music as they perform during a children's Carnival parade Photograph: Jorge Silva/ReutersIvrea , Italy: Rival teams pelt each other with oranges during an annual Carnival battle in the northern Italian town Photograph: Chris Helgren/ReutersRio de Janeiro, Brazil: Members of Vila Isabel samba school dance during the first night of the Carnival parade Photograph: Fernando Soutello/ReutersTorres Vedras, Portugal: Carnival goers dressed as miners, arrive at the village parade Photograph: Jose Manuel Ribeiro/ReutersCuruca, Brazil: Carnival goers covered in mud from mangrove swamps before parading in the streets at the point where the Amazon River meets the Atlantic Ocean Photograph: Paulo Santos/ReutersSardinia, Italy: A man dressed as a knight rides a horse at the end of the 544th Carnival of Sardinia Photograph: Mario Laporta/AFP/Getty ImagesVenice, Italy, 15 February 2009: Costumed revellers walk in Saint Mark's square during a performance to mark the beginning of the this year's 'Sensation of the Six Senses' CarnivalPhotograph: Vincenzo Pinto/AFPAsunción, Paraguay, 14 February 2009: A dancer joins the fun in the third week of the Encarnación carnival. Paraguayan Carnival is held in February all around the country, the most popular celebrations take place in Encarnación, Villarica and CaacupéPhotograph: Diego Benitez/EPARio de Janeiro, Brazil, 15 February 2009: Carnival revellers walk with their costumed dogs during pre-carnival festivities on Copacabana beach. The pets are entered in a pre-carnival fashion parade, now in its seventh yearPhotograph: Bruno Domingos/ReutersMontevideo, Uruguay, 5 February 2009: Uruguayan painter Carlos Paez Vilaro (left) plays the drum with members of a 'comparsa', carnival band, in the 'llamadas' parade - Spanish for 'calls'. On the first Thursday and Friday of February, thousands of people crowd the capital's traditionally black neighbourhood as costumed drummers and dancers kick off this street fiesta, which originated from the colonial period as a parade of slaves on the streets of the cityPhotograph: Andres Stapff/ReutersJacmel, Haiti, February 15 2009: Haitians celebrate Carnival, which is marked by parades, pageants, masked balls, elaborate costumes, seductive music and great dancing on the streets. Festivities bring a diversity of cultures to the area Photograph: Thony Belizaire/AFPNice, France, 14 February 2009: People take part in a parade of the 125th Nice Carnival. This year the theme will celebrate 'the art of concealment in all its senses', from wearing a simple mask to changing appearances with plastic surgeryPhotograph: Valery Hache/AFPQuebec City, Canada, 14 February 2009: People play in the snow during the Carnival 'snow bath' Photograph: Mathieu Belanger/ReutersCanary Islands, Spain, 14 February 2009: A dancer takes to the stage during the Carnival Group Contest in Santa Cruz de TenerifePhotograph: Cristobal Garcia/EPA