Copacabana Fort is located in the southern part of Copacabana Beach, and it is a famous military base in Rio de Janeiro, as it contains a defensive fortress extending on the coast, in addition to the Historical Museum of the Army, and the purpose of the castle was to protect the beach and port from any external attacks, and it was built In 1914 AD, it consists of two fortified domes, each containing cannons. The castle also includes a tower that was used for defensive purposes. Today, it is open to the public to visit and learn about its facilities.