Outside, on the fort grounds, are artillery pieces from the late 19th and early 20th centuries.
Tijuca National Park protects the Tijuca Forest and several viewpoints overlooking the city, and surrounds Cristo Redentor, the giant-sized statue of Christ on Corcovado.
One of the world's most famous pre-Lenten celebrations - as well-known as those in Venice and New Orleans - takes place each winter in Rio de Janeiro.
The celebrations begin shortly after New Year, but the splendor and extravagance reaches its spectacular climax in the four days before Ash Wednesday, attracting hundreds of thousands of spectators to its street parades, samba parties, and shows.
UNESCO's accolades weren't just for the natural setting but also for the urban cultural landscape and the mix of architecture and planned green space that characterized the city's growth.
The parade route is 700 meters long and 13 meters wide.
The Art Deco statue was created by Polish-French sculptor Paul Landowski and built by the Brazilian engineer Heitor da Silva Costa, in collaboration with the French engineer Albert Caquot.
Made of reinforced concrete and soapstone, the figure itself is 30 meters tall with arms stretching 28 meters; it weighs 635 metric tons.
Other Brazilian cities celebrate Carnaval; it is also a major tourist event in Bahia and Recife, but Rio's is the most lavish.
The most spectacular events are the parades of the samba schools, which are held in a unique venue designed by renowned Brazilian architect Oscar Niemeyer.