Alex D.
Yelp
Great evening activity for anyone in the Copacabana area. They charge an admission feel to enter and walk around, but it's worth it. There are two cafes inside which appeared quite busy - we had already eaten, so we didn't try them out. The tables for the restaurants had a great view, though, and sipping a nice cold one would have been fun on a hot evening.
The views from this fort are incredible - make sure you walk all over the grounds to see for yourself - we preferred the views from the large boulder at the end of the small peninsula, as we were able to see all of Copacabana and look out into the blue ocean, all the while enjoying a nice breeze. It can get a bit crowded in the evenings, but it's well worth the stop, especially if you are venturing into Copacabana later!