The inside track
On the Great Brazil Express from Curitiba to Morretes, make sure you request a seat on the lefthand-side of the train. On Honey Island, a torch is essential after dark as trails are unlit. For excursions in the rainforest and at Iguaçu, bring a waterproof jacket and walking shoes with good tread. A pair of binoculars may also be useful. Do not feed the coatis or capuchin monkeys in the park.
When at Iguaçu, carry your passport if your tour includes excursions to the Argentinian or Paraguayan side of the Falls. Stow it in a drysack. Try to stay for at least one night at the Belmond Hotel das Cataratas located inside the park.