Fernando de Noronha is the most beautiful place I ever went in my inteirely life. Best dive, most empty island , most conservation focused place on earth. Deserves a visit of at least 4 days. Dive in Ilha Rata, spent a day swimming with the turtles and having a meditation of life in the most wonderful place in the world.
Dolphins can be seen about 5 a.m. in the morning, need to wake up soon.