I took a three hour cruise from Búzios that stopped at a few spots for swimming and went near Ilha Feia, a deserted island. I was quoted BRA$50 for the tour in the hostel but got it for BRA$30 on the street.
The boat left from the pier near Orla Bardot in the town center. We waited for everyone to board and got going. The first point of interest was Ilha do Caboclo, a tiny little island that sits just off the pier.
We then started sailing along the coast, first past the main beach in Búzios, Praia do Canto, and then to Praia da Tartaruga.
What I really thought was interesting was how at one of the swimming stops, a small boat pulled up to our boat and sold kebabs. There was nothing on the small boat but a grill and two men. One man was cooking while the other was selling the food.
When the other guests finished swimming (I didn’t swim), we went near Ilha Feia, a rough uninhabited island with some small coves. I spotted one man with a kayak and a table sitting in a small cave on the island, which I though was interesting.
After a close encounter with a huge ship, we passed by Ilha Branca, another deserted island.
Finally, before heading back to the pier, we passed by a few of the popular beaches in Búzios. They were Praia João Fernandes, Praia Azeda, and Praia dos Ossos.
It was a nice, short tour that everyone enjoyed. If I was swimming like the others, I would have preferred more time in the water than what was given. Other than that, being able to see Búzios from the sea was enjoyable.