Brazil is one of the largest of the world's countries and offers visitors a great deal of natural and cultural variety. The spectrum extends from the dense rain forests of the Amazon to the modern metropolises such as São Paulo or Rio de Janeiro. This country has unique natural landscapes, such as the Iguaçu waterfalls, for example. Rio de Janeiro is world-famous for its carnival, but also has numerous beautiful beaches and a busy city centre. Recife is particularly popular with surfers.