The modern fort built at the beginning of the 20th century is open to the public and is well worth the visit - both for the museum and for the fabulous views of the nearby beach. There are many interesting exhibits to be found for those interested in military history of Brazil.
Museum admission:
Adults: 6 BRL
Seniors over 60 years: 3 BRL
Students with Student ID: 3 BRL
Children under 10 years, seniors over 80 years: free
Wikipedia https://en.wikipedia.org/wiki/Fort_Copacabana
Official Website http://www.fortedecopacabana.com/
Phone +1 55 21 2287 3781
Address Praça Coronel Eugênio Franco, 1 - Posto 6 - Copacabana, Rio de Janeiro - RJ, 22070-020, Brazil
Coordinates -22°59'10.913" N -43°11'14.091" E