According to the Guinness Book of Records, Praia do Cassino is the world's longest beach . It is to be found along the coast of Brazil, specifically that of the state of Rio Grande do Sul. The name is in Portuguese, and means "Casino Beach" when translated into English.

Praia do Cassino (Portuguese for Casino Beach) is the world's longest sea beach and is located in the southernmost of the Brazilian coast ( 3307 234 3S 5238 222 3W), on the South Atlantic Ocean, in the Rio Grande do Sul state.