Fortaleza, Brazil at €543 rtn

Forget Rio and São Paulo — this is one of the cheapest ways to get to Parnaiba. The city is home to the only open-sea delta in the Americas, and you can get there from Fortaleza with a quick flight or a 7-hour drive.

When you get there, you'll greeted by incredible landscapes and wildlife, from dunes and monkeys to mangroves and caimans. But the highlight? The unique Revoada dos Guarás — a sunset scarlet spectacle, as hundreds of ibises flock, creating an awesome array of red hues in the sky and turning the treetops into crimson canopies.