In the Latin America, the most notable and exuberant outdoor popular manifestation of carnival is found in Brazil, where the carnival season take a few days, beginning on the Saturday before Ash Wednesday and celebrated - normally - from noon of each day well into the small hours of the next morning.
Please click on a link to go there:

Acadêmicos do Engenho da Rainha - Rio`s samba school
Acadêmicos do Grande Rio - Rio`s samba school
Acadêmicos da Rocinha - Rio`s samba school
Axé Music - Ara Ketu, Asa de Águia, Cheiro de Amor, Ricardo Chaves, Pimenta N`ativa and Timbalada
Carnafest - Bloco Cheiro de Amor - Bahia`s carnival
Carnatal - Natal`s carnival
Carnaval da Bahia 97 - pictures of Bahia`s carnival
Beija-Flor - Rio`s samba school
Caprichosos de Pilares - Rio`s samba school
Carnaval no Brasil - schedule of events around the country
Em Cima da Hora - Rio`s samba school
Estação Primeira de Mangueira - terrific!
Estácio de Sá - Rio`s samba school - Ala "Amar é Viver"
Estácio de Sá - Rio`s samba school - Ala "Surpresa"
Imperatriz Leopoldinense - Rio`s samba school
Mocidade Independente de Padre Miguel - Rio`s samba school (official site)
Mocidade Independente de Padre Miguel - Rio`s samba school (unofficial site)
Olinda`s carnival - birthplace of "frevo"
Portela - Rio`s samba school
Rio Carnival Guide - a lot of tips about the big show
Rio de Janeiro`s Samba Home Page - some facts about the history of carnival in town
Salgueiro - Rio`s samba school official site
Salgueiro - Rio`s samba school - another home page
São Clemente - Rio`s samba school
União da Ilha do Governador - Rio`s samba school official site
União da Ilha do Governador - Rio`s samba school (unofficial site)
Unidos do Jacarezinho - Rio`s samba school
Unidos da Ponte - Rio`s samba school
Unidos da Tijuca - Rio`s samba school
Viradouro - the 97`s parade winner (Rio de Janeiro)
World-Wide Samba Home Page - curious site about samba around the world, including Brazil