The beauty of the dunes starts in Cabo Frio,on the way to Arraial you have "DAMA BRANCA" dunes(the white lady).
The dunes can be dangerous because of robberies,so get advise from the locals before heading out to the beaches and dunes!!!
Don't miss it!!
To get to Blue Grotto,on the fair side of Cabo Frio,ask fishermen at PRAIA DOS ANJOS for a boat trip,it should coast about $20.
Be alert to the tides:the entrance to the underwater cavern isn't always open!!